What kind of Alternate History game would you be interested?

Pre 1800 is possible, but takes a deeper knowledge and understanding of the culture of the time. It also rules out anything economic or industrial of any depth and can rapidly spin out of control with a few calculated moves.

If you set out already not aiming at the highest and best in the name of realism, you are fundamentally limiting what can be achieved.

If everyone already knows the “secrets” and paths to victory in WW1 and WW2, then there will be necessity be a large element of AH. However, you’d want to avoid Frisian Islands levels of AH and “creativity”

Creativity is a good thing if everyone is on the same page as to what it means and the extent it works. I’ve never encountered that. Without rules, cracks appear and people try to exploit them. Frankly, the World Wars were prime examples of numbers games beating creativity. Systems don’t need to be complex, but they are needed if you want to simulate land, sea and air war, strategic bombardment, submarine war and ASW/tonnage battles, blockade and other aspects. I would suggest that these can’t really be handwaved. The economic front allows clear limits on what can be afforded and an industrial system allows both the build up of production infrastructure and the capacity to hurt that of your enemy.

“I vant to build 200 U-Boats!”
“Meiji Fuhrer...Steiner...”
“Steiner says that the attack by the Allied bombers destroyed our capacity in several yards. We are limited to 100.”

Creativity is not always a good thing. This came from a WW1 game in 2012:

The Bulgarian division that is currently stationed in Sofia (D8) is to be moved to join the new recruits for an offensive strike against Serbia. this Offensive strike will take place with little to no siege weapondry and no machine guns. However, Bulgarian soldiers will be broken up into a different type of unit then normal.

Due to the lack of firepower by our army, the Tzar has decided to employ a new type of warfare. This warfare is primarily one that has been used by our people since before the Middle Ages. This is the war of aggression. Boyars were used more as a shock effect force then, but now, we have lost our old ways.

The Tzar has made it clear to the men training our companies that the old ways are to be used along side of the new ways. After this great war, we will stand the victor and the Serbians will be crushed. The men are to be deployed among the following orders and trained to do their specific jobs.

200,000 of the men are to be deployed as normal troops. They are to be armed with the normal attire of the Bulgarian Army and will be divided up as normal Bulgarian troops would be. These men are to know nothing of the special forces of the Bulgarian invasion. They are cannon fodder.

The rest of the 350,000 men are to be deployed as following:
The most physically fit men, who can run five kilometers in twenty minutes or less, will be the light shock troops. These men, numbering in the 100,000 range. Will be armed with nothing more than pig bladders filled with black powder, knives, and a Luger P08 with no ammo refills. Their uniform will be that of a Serbian lower class. Once these men are trained in the way of their weapons, they are to break up into 5 man squads, one man is to know the Serbian language, and travel into Serbia along its non-Bulgarian borders. They are to be careful to not be caught and will be denied of existence and labeled as traitors and deserters by the Tzar if they are caught. Their orders, however, are simple: blow up any ammo depots of the Serbian Army, avoid the mobilized Serbia troops, and make their way to the Serbian capital and cause as much havoc as humanly possible for the Serbian government. These men will know of the existence of the other squads, but will not contact them in any way.
The next 200,000 men who are to be deployed are to be armed with the standard rifle and ammo capacity, and are to be deployed in 10 man squads that are to make their way through Serbian territory and meet with ten other squads at a predetermined location. These men are then to ambush and harass the Serbian Army as they mobilize against Bulgaria's 200,00 man deployment. THEY ARE NOT TO DIRECTLY ENGAGE THE SERBIAN FORCES. These combosquads will have one commander in their midst who will give orders that they believe are to benefit the Bulgarian cause.
The last 50,000 men will be deployed by Bulgarian forces to spy upon the enemy. Armed with nothing but a combat knife, and their own prowess, these men will be the smartest of the 550,000 men that have been drafted (Must be literate and show aptitude for learning military strategy). They are to work in direct conjunction with the 200,000 man harassment force. These two man squads will spy on the mobilizing forces of Serbia, and the cities within Serbia that hold key officials. If the squads are not in conjunction with the harassment force, then they are to attempt to eliminate key government officials who are for the mobilization against Bulgaria.

Bulgarian forces will mobilize in the following waves:
First five hundred five man squads will mobilize and make their way into Serbia. Then, a day later one hundred two man squads will mobilize and begin their spying efforts. Then finally, 1,000 ten man squads will mobilize and meet all along Serbian space.

These mobilizations are to loop until all units are deployed. Once these deployments have taken place, the 200,000 remaining cannon fodder units are to mobilize against Serbia with an ultimatum: "Serbia is to surrender or Bulgaria will mobilize more troops than our 200,000 men."

This was in the context of a new, teenage player coming into a full World War, with Bulgaria having previously won at Catalca and occupied Constantinople in the Balkan Wars. The order was knocked back by disbelieving staff and his next attempt consisted of sending 90% of his forces to fight in Galicia. Between the Serbs, Greeks and an Allied force landing in a virtually undefended Gallipoli peninsula, he didn’t end up so well.

Conventional Numbers War 1 - Creative Pig’s Bladders 0

The overall strategic approach taken by players in games can be divided into the following categories:
- Do what occured historically, with historical means and equipment, in order to achieve historical goals.
- Do what occured historically, with historical means and equipment, but with a greater degree of expertise or intensity in order to achieve slightly better results than historical in the pursuit of broadly similar historical goals.
- Historical path with different means and equipment to achieve the same general goals
- An ahistorical path with different means and equipment for the same general goals
- Ahistorical path, different means and equipment, different goals

Having said all that, if what is preferred is a far simpler forum type game, I'd perhaps still be interested. It really depends on the scope, players and nature of it.