I've played a bit of DCUO with Gator and Grey, even bought the shield and lightning pack (both fun). As for pay-to-win, I didn't see that with my experiences. The shop mainly has two powers (Lantern/Lightning) and one weapon you can buy (Shield style), but the rest are either limited time EXP-boosts or cosmetic items. Yeah there's a limit on how much money you can have but it feels more balanced across the board compared to Champions (again, a fun game but the F2P toons get less skills and options compared to payers).
TF2 is always fantastic, Tribes: Ascend looks great and is solid if you prefer that gameplay style (fast moving that requires good aim). APB Reloaded can be fun when playing with friends but the PVP is pretty broken when it queues you up, newbies against maxed out guys with the best weapons. LOTRO is a solid choice but may require an item shop purchase to unlock better features. Fallen Earth didn't keep me interested (and was pretty ugly even with max settings). Puzzle Pirates is great for the kids, the community is pretty nice and the games are enjoyable. Global Agenda: Free Agents has a cool MMO feel but the PVP can get very imbalanced.