I don't make much distinction between board and card games. I'm not as well versed in the standard-deck-of-playing-cards games, but my gaming group frequently convenes for Spades (Bridge's not quite as smart younger sibling).<p>A lot more of this question might be finding games that chellenge you in the right way, and which go well with your gaming group.<p>Personally, I dislike most of the Catan games, and most games with dice involved. On the other hand, if Caylus, Brass, Tigris and Euphrates, or Dominion hit the table, I'm set.<p>All of those games provide multiple avenues to victory and multiple methods of player interaction. Additionally, they require a high amount of intellectual work (not quite so much with Dominion) and a healthy balance between strategy and tactics. Finally, all of those games reward experience, and make for extremely satisfying matches when matched up with someone of equivalent skill, with little to no randomness that can't be balanced out somewhere. Finally, I like that while there are certain modes of thinking which carry over sometimes, by and large each game requires a different type of problem-solving (Caylus's manipulation of resources and linearity; Brass's manipulation of networks and income; Dominion's manipulation of probability and the transitions from opening to mid-game to end-game; and so on).<p>(Side note: you might enjoy Dominion, as it hits the sweet spot between board and card game, and does not rely on "theme" a single bit).<p>As a more general note: both card and board games (as broad as those categories are) can provide a lot of enjoyment, or not very much. I think it's a matter of fairly assessing one's motivations for playing (both in general and on a given day) and the tolerances/temperances of the gaming group.