Like
TDMS - Provided there's more than a few people and any buildings look like effort was made to make them
Freebuilds - To a certain extent it's better than building on singleplayer
Death Race - Mindless entertainment to waste an hour of my life :D
Death Run - See above, plus it's a challenge but with more danger
Dogfight - It's technically a TDM, but aerial combat is so much fun than running at your enemy with a machine gun
Dislike
love RPs - Why would anyone want these?
Knife TDM - I fail miserably at them, so I dislike them
City RP - They get boring very quickly unless you go on a killing spree and hide away in your safehouse. Admins don't like killing sprees.
Free Admin - Anyone who says this is declaring their server terrible, although it is useful for advertising (for a bit)
Neutral
Family RPs - Occasionally there's a good one where people actually do something useful, but they usually end up as crude house building servers with people screaming "Be mah Daddd!"
Trench TDM - Building and being shot at, although they lag profusely after about 30 minutes
Salvage TDM - Never been to one, so I can't judge it
Jail RP - If there's not too many freekillers it's fun, but there often are
RPGs - Collecting resources to get better weapons to collect more resources. I may as well go play RuneScape like I normally do