DLCs, it depends. I'm not a fan of them, but there are some DLCs that are worth the money for what you get. And by that, I mean having to pay maybe just $5 or $10, but it's really almost the equivalent of a half-expansion. Arguably, WoW's expansion packs could be considered DLCs in some form (but those are much, much bigger than the average DLC).
Not a fan of the BF3 DLC, and refuse to buy it. Actually stopped playing BF3 because I can't play in eGO servers anymore without the DLC, and, well, other games are more fun for me that don't try to rip me off.
Favorite game of all time: Tribes and Tribes 2. They set the FPS standard for gameplay and huge maps to play on, not to mention the large scale battles that could occur in servers (64 v 64!)