One of the problems of not playing for any length of time, as has happened as a result of our house move, is that my normal Gamer ADD, constrained by actual play, is unleashed. With no campaign on the table, any campaign is on the table. In any genre, in any setting, using any system.
But I think that I have narrowed the next game down to a 'space game'. But which one?!
Despite owning quite a few different 'space games', I have boiled it down to the classic choice; Traveller or Stars Without Number. Other systems that I own have been set aside as these two, in my opinion, support a 'traditional' sandbox campaign without the kind of heavy crunch that, when GM-facing, inhibits the facilitation of PC freedom of action, and when player-facing, intimidates the non-'gamer' players with whom I play.
Stars Without Number is a thing of beauty. Truly. The GM advice is worth the price of the book alone - though the book is free - and the sector generation tools knock those of Traveller (any version) into a cocked hat when it comes to producing 'adventuresome' situations. SWN has a lovely simple faction system that allows the players to impact on the 'big politics' of the setting, the rules for AI and mechs are straightforward, and the supplements are... yadda yadda yadda. SWN is cool, and will only get cooler when Starvation Cheap, a supplement for military campaigns, is released.
So Traveller would seem undone, as far as my preferences go. But Traveller has one big advantage, when it comes to an open-ended sandbox campaign, and that it the way the PCs are built. No, I don't mean the minigame - which I love, and Kevin Crawford as 'sorta-kinda' replicated that for SWN in Sandbox #2. I mean the fact that PCs roll out of the gate fully formed, at least as far as skills and so on goes. They don't 'level up'. And this means two things.
1 - With 'fully formed' PCs, the 'adventures' out there don't need to be scaled for 'level'. If a danger or hazard out there is too much for the PCs, it is because they haven't accumulated enough in-game-setting resources to tackle it, not because they haven't spent long enough accumulating in-game-system points.
2 - With 'fully formed' PCs, PC death and new or intermittent players can be incorporated much more easily. Starting PCs are as competent as they are going to get (more or less). Though the 'party' might grow in strength, this is often due to the accumulation of (nominally) shared resources; wealth, hardware, contacts, etc.
So I've got my Traveller Book, my Mongoose Traveller, and my Stars Without Number, and really, as in all cases of Gamer ADD, I just need to get playing, and if that doesn't solve it, get playing more. Analysis paralysis is resolved, by necessity, at the table.