Have not gamed it yet but for some years have been collecting and painting figures for the Upper ad Lower Canadian Rebellions of 1837/38. In similar vein I have armies for the almost fought Aroostook War some of which double up from the Canadian revolts. A select few will double for 'what if' Chartist revolt campaign.
I have the British half and a few (mostly unpainted) Egyptian figures for the 1840 Syrian campaign. The Royal Marines and sailors double for anti-slavery patrol forces.
Relative sanity has kept me from doing the Scinde campaign, although conveniently the troops now exist to do it courtesy of Empress/Iron Duke.
I have a sizeable force of interwar Czechs for a Munich Crisis invasion including a platoon of infantry, another of SOS border guards (gendarmes and finance guards) as well as armour and supporting weapons. Built the terrain have most of the requisite German opposition but not got around to gaming it. Along similar lines I have the Germans and Norwegians for April 1940.
Currently working on 28mm forces for Cold War gone hot in Berlin with forces for both 1961 (the Wall goes up) and 1984 scenarios and including for scenic purposes a small chunk of the Berlin Wall. While the Cold War is hardly obscure I've not heard of anyone gaming it specifically in Berlin before. Terrain density suggest probably why this is the case.

I have forces in 28mm for both sides in the Aden Rebellion of the 1960s as well as the Borneo revolt and Indonesian Confrontation. Forces for both sides for the Guerra Colonial in Portuguese Africa. I can proudly say that my interest in that conflict is in part responsible for their being a dedicated 28mm range of such exotica.

In the past I have gamed the Franco-Portuguese conflicts in 16th C Brazil and started but abandoned the French invasions of Rio de Janeiro at the start of the 18th C.
The pleasure in doing something unique is quite profound. The research, the hunt for suitable figures and terrain, the conversion and scratch building. It all comes down to satisfying my in intellectual curiosity.
The downside compared to off the peg wars and scenarios is the time it consumes and the tendency to say I'll pick this up again when I've worked out how to build 'X' or 'Y' but I suppose that afflicts gamers of more popular periods too to a lesser extent. There's also less interest from others in gaming such things but hey.
Given the time and resources I would love to do the Cisplatine War or the Portuguese-Spanish campaigns in Brazil of the 1770s, both of which I have excellent source material for. Likewise the Canudos War and with further research the Peru-Colombia War of 1932 and the Peru-Ecuador War of 1941.
The list is endless. The key is self restraint.
