Although I'm not super into DMs, they are fun to play at times if they're good.
Sadly, so far I haven't found any truly good ones. A lot of them were either too easy, too hard, unbalanced weapons, bad build, unmoderated, bad teammates.... the list goes on and on.
Knife DMs are sometimes fun, but not if they're too hard. Plus I went to a knife DM where you had a rocket launcher and jets. Sucked.
Heedicalking's would have been good if you didn't have to walk..... and walk... and walk.... and walk...
I did see one TDM that I liked even though it was a bit too difficult. I had teammates who actually were teammates, in that they went together and didn't split apart. We had well-balanced weapons, a good map, good admins, good server in general. I don't remember what it was called.