actually..i'm pretty sure cardgames aren't in. Yes, some people play them, but it sure as hell seems like they've been on the decline.
They were probably at their height right when yugioh came out (but pokemon was still big), and the hardcore were still at magic. (pretty much all other card games suck, no offense. maybe they're fun..but they don't have the communities to back them up)
i played pokemon pretty seriously. and built some tournament-worthy decks. My final deck, knowing future sets of cards would become too powerful normally to beat, i designed to take out decks better than itself. Its comprosied of clefables, dittos, igglybuff, old promo mewtwo, and jungle mime, and 4 super energy removal and 4 energy removal. (and the rest ofthe deck revolving around the same theme: use the oponents own card abilities against it, while keeping them unable to attack.
recycle/potion/fullheal/double colorless energy(since it requires so few psychics)
and all the top tier trainers: scoopups, oaks, elms, gust of wind, itemfinder..............
and a Plus Power. i think every deck should have a single plus power. cuz u never know when u need just 10 more damage to save your ***. computer search that *****.
i know every deck has a weakness and can be countered..but from my experience that one, at the least, can still stand up to many of these new overpowered decks :/