Lightweight: The Crew: Deep Sea. Don't get to play it so often, but if I had to pick a game to fill a few minutes this is it. Rules are dead simple, decision space is deep without being paralyzing, and there's lots of room for fun stories either good or bad.

Medium: Dominion. Love it, all-star game for me, could play this anytime anywhere. Perfect mix of strategy and luck, and building a deck is always satisfying win or lose.

Heavy: Fury of Dracula 3E. Another I don't play often (the local taste for board games is solidly in medium weight). I very enjoy the hide and go seek aspect, as dracula you get to feel like a mega-genius pulling all sorts of dastardly tricks, and as a hunter you get to feel great teamwork and satisfaction when you corral dracula with coordination and skill. The card-based combat system is great too, and makes fighting a constant duel of mind games

Most played: Dominion, see above. Sadly I played the most of it before I started tracking my plays, but even with that it is at the lead of my most played games, eclipsed only by MtG Commander (which isn't a board game imo)

Favorite game: okay let's pretend it's not Dominion again lol. Besides that, I'd have to say... Cthulhu Wars. It's not the best designed game I have, or even necessarily the most fun, but the combination of crazy asymmetric abilities, familiar risk-like gameplay with several crucial twists, and the physical aspect of a huge board and giant toys, all combine to make it a real show-stopper of a game. I've literally gained friendships because of this game and it's raw appeal. And hey, it looks like I may finally get those xpacs I kick-started soon, only 4 years after estimated delivery lol