I dont like sticking anything but thighs and delts....
I used to be that way, but eventually it something you just have to get over. Actually my favorite place to pin now is my pecs, DIV got me going on that, so props to him. For myself, pining the pec and then hitting chest is one of the best ways to disperse what was injected...give it a try and see what you think.
My next move is to start pinning my lats, haven't done this yet but will soon.
If there is one spot that is my least favorite to pin it would have to be bi's. For some reason unknown to me these can be excruciating, and no matter how hard I hit bi's that day it does not seem to help. I'm hopeful though that with time this will ease up a bit. If it doesn't, no big deal, I've got plenty of other spots to hit.
Oh, and one more thing about bi injections, does anyone else find this spot difficult to pin? I don't mean in terms of the actual pining, but almost every time I stick one of my bi's and then aspirate I get blood and have to re-inject another point. I'm not hitting a vein, I can see my veins and I am aware of the exact spots on the bicep to pin, but apparently I seem to be hitting some sort of blood vessel almost every time I first pin. I don't know, maybe it's just me, but it's kind of irritating.