Welcome to the forums! The point about siege is definitely good - most newer players don't use enough. I rate Charismatic well above Aggressive, but not due to war. Charismatic is better for most wars, but Aggressive is better for the rush. But Charismatic gives the happiness boost as well which is really nice. Like you, I don't put my GG units in harms way. Of course, my only GG units are supermedics, everything else gets settled. Note: I think the Military Academy question is partially decided by what speed you play on. Normal it might not be worth it if you can get out units in 1 or 2 turns. On Epic or Marathon then the Military Academy becomes more attractive.