My favorite game modes are XLRS (regular LRS rewards hiding too much), Jailbreak, and Ground Force. It's unfortunate that the latter suffers so much from JJ2's terrible syncing of destroyed tiles; I miss /update. Not to mention the general lack of good levels for it.

I don't like JJ2's CTF. With the fast pace of the game and a chat system that prevents you from doing anything else, it's really difficult to communicate anything useful to teammates, and nearly impossible to do something really coordinated. I also find it rather repetitive, as most levels end up with large portions of their layout ignored, and *cough* it has a few levels that get played all the time and a lot of (good) levels that are pretty much ignored.