Proud owner of multiple twinks, currently a 19 priest and lock. Priest has +349 healing (in full healing gear) and lock has +155shadow dam, (and 1.5k health unbuffed).

I enjoy playing them between arenas on my main and because once you complete one..its done..a level 70 has to level, gets new gear sets, etc...I have perfect twinks, and I'm satisfied with them, and always will be. I admit it is fun to 1-shot someone occasionally, but thats not why I do it. Adds more thrill to the game for me..pvping is so pointless on my main anyhow..my gear is such that I shred through most things in any BG and the only challanges are other like geared people...or when I get ganged up on...I spend most of my time "pvping" in westfall/goldshire..thats what real pvp is, world pvp..but I dun like the 1 hour walk time back from far eastern elwynn forest, and playing one guy gets boring after a while, so I log my priest and spam 580 heals (noncrit) and 83 a tick renews on myself, while 5-6 nontwinks frantically try to kill me.

Or kite them around on my lock, dots ticking 35+ at level 19. To me its part of the game...