I don't like to put in a lot of forethought, which is why I'd make for a terrible political leader. I like to improvise and plan while I'm already in motion, which is why I adore faster-pace games like Ratchet & Clank, Audiosurf or Counter-Strike.
I do enjoy puzzle games like Portal 2, but the thrill for me is how fast I can solve them and rush through to the end, rather than pacing myself out. Should be noted that I always prefer to go for no-kill-stealth runs in certain games (like Deus Ex), but even then it always comes down to very fast, improvised plans of action, trying to incapacitate all the enemies (if there's EXP on the table and the option is available) or rushing through to the exit quickly.
In class-based games, I'll play one of two roles; I'll either be the objective-taker (for example, capturing flags) and I'll move quick as possible with little preparation time to each objective, or I'll play support and I'll focus my entire game-time in stuff like healing players, fixing devices, collecting vehicles/ammo for others etc. Again, I try and rush between team-mates and get everything done quickly. Good example of a game where I play both is Tribes: Ascend; I know the perfect path to capture the flag on every map and so you'll usually see me with 10+ captures by match end, simply flying between the two capture points, but sometimes I'll go entirely as an Engineer and spend the whole game reparing engines and turrets, usually getting over 500 repair medals before match end.