I like it, it's a nice change from my playing of conquest the majority of the time (I just recently tried TDM for the first time in many months, and some of the maps feel like new maps because of the sections played on). The maps feel of a resonable size in CTF, yet, there's always something going on - the game mode feels lively. Without the dirt bikes, i'm sure it would be much slower paced.
I think some who like it though just like it because it's new and/or there's achievements and assignments tied to it. I'm sure that in about 2 months, there will only be a few dedicated CTF servers remaining