I do like the RC car I play domination a lot so it's speed is quite useful in protecting a flag. It's very useful in taking out campers on a long killstreak, or when a group of players has a section of the map on lockdown. Also, It can be a great device to distract enemy players from your allies advance, most people are too busy trying to take it out to notice they are about to get shot.

Mostly though, I just enjoy terrorizng people with it. Nothing like running over a snipers face with it.