Hmm. Actively play:
L5R LCG. Playtested core, did not try to finangle continued PT opportunities as I realized I really missed the anticipation of not knowing what cool things are on the horizon (and because I'm not sure I added adequate value to justify asking to continue. ^^; ). Am looking forward to playing in casual tournaments locally/regionally, and occasionally traveling abroad for awesome fan events. Don't plan on playing competitively: FFG's high-level OP TOing doesn't hold a candle to PBE's.
Netrunner LCG. My first LCG addiction. I'll likely play 3-4 months a year, in the lead up to the local OP Kit tournaments I run. I miss the bluffing/deduction style play of codegate - sentry - barrier that the early meta had, and I don't like the stale metas that developed repeatedly. Plus, I found there was less room to be competitive through good play with a deck 'in development' or a sub-par decktype . (Maybe I just suck more at playing the game. )
Star Trek CCG, 1e (Decipher/Continuing Committee). Oh boy, this monstrosity. Huge flavour. Much Rules. Such Glossary. I still haven't worked up the courage to try online play 'for real', but have a blast playing a sealed deck variant on Lackey. I also try to keep up with physical copies of the new cards, because they are purdy and awesome. I also like the design insights that crop up on the boards: it is neat to see a group of professional-quality volunteers taking a game that was commercially killed off because it was too expansive, complicated, and dying of power-creep and turning it into a living, expanding, fun game. It is neat getting a look 'under the hood' at how errata, bans, and new cards (to plug holes, use innovative design to reinvigorate old binder-fodder, and create new decktypes) can all work well... and where things can go awry.
L5R CCG: I keep meaning to pick a format, and finish my collection. Still have a few booster boxes for draft, and I like Siege play... but time, brain space, opponents, all limited in supply.
Lord of the Rings TCG (Decipher): ah, this is where it all began. Nostalga and an almost complete playset of the cards mean this will have an essentially permanent home in my collection, even if I haven't played in years.