military bunkers are nice just make bed downstairs
labs upper floors are nice most times it have bedroom alslo iron doors are nice
miliary outpost is not too good but after getting few friendly turrents and destroying hostille zombies and turrets it can be nice place if you managed to do not destroy chainlink fence and placed bed and oven inside building
firestadion well its realy realy nice just is hard to loot at day so sneaky runs and night only because its in middle of city but at least in big city you do not have to worry about long looting
farms are not bad too because its far away from town just board up windows and make some spiked pits alslo you have tools and you can farm food if you want
alslo is good to have lava somewhere even is good to build a house on one
about mobile bases i can’t tell anything because is never used it