Interesting approach.

I think the terrain aspect really is the key.

Terrain (especially my 25+ mm Adobe town) often determines what you do and in what sized space you play/store stuff.
While I can do Zorro, New Spain to historical Mediterranean era battles, Fantasy, SF, and VSF in the same 25+ mm buildings they really are glorified small unit skirmish games and not decent sized battles. Is that what I want or am I limiting myself? I think that would be the latter.
Aero is king to me but I find that there is the temptation to do 1/600th, 1/300th, 1/144th or 1/200th (I have seen claims of both for Wings of Glory/Wings of War *,) or even 1/72nd (local group, not me,) even there. I am currently entirely 1/600th for that and I hope to stick to that scale solely for winged warfare.
So of course, I do naval in 1/6000th...

but then I may just drop the whole naval war game thing in the future.

That would be a minimal effort since I have such a (no pun intended) small collection of these ships.
Seriously, this is something I am dealing with from the perspective of retirement/space in an apartment versus the current 5 bedroom house with basement viewpoint so I have given much thought to this issue.
I really think I will end with several scales (
mostly 1/600th historical armies, majority of
battle forces in 15 mm [plus they would be good for SF skirmish, VSF skirmish, and Supers,] and,
other than a much reduced "l1970s legacy" dwarf army - no more than a
half dozen small {6 to 10 figure teams in 25+ mm.}
Potentially the 25+ mm figures would be for FRPG/Fantasy skirmish, SF skirmish, VSF skirmish, probably Zorro, possibly Supers, for playing games with people who game in that size figures - the Zorro figures could cross from RPG to Supers to VSF to possibly even FRPG so some teams
may share figures. I currently know people who only play in 25+ mm sized games and I expect that will continue in my lifetime (though I seriously think it will represent more and more a reduced percentage of the hobby in the future) to be a significant part of the gaming scene.
Terrain will be mostly 15 mm and 1/600th since the 25+ mm figures are for potentially playing in other people's terrain/games. Selling/giving away the Adobe buildings will really be painful/difficult.
While this not "one scale armies/terrain" that I originally considered I think it is realistic plan that emphasizes the realities of my life after 2016, (Good Lord Willing,) while allowing me to not shut myself out of cooperative/participation gaming with others who like the larger figures.
Gracias,
Glenn
*
WW1 Wings of Glory Line « Ares Games
www.aresgames.eu/games/ww1-wings-of-glory-lineThe WW1 series of Wings of Glory is an easy, fun to play, fast and furious system ... to play Wings of Glory, includes two airplanes in 1/144 scale, fully assembled ...
WW2 Wings of Glory Line « Ares Games
www.aresgames.eu/games/ww2-wings-of-glory-lineThe WW2 series of Wings of Glory is an easy, fun to play, fast and furious system ... to play model in 1/200 scale, including a maneuver deck and gaming base.