I pick what seems cool.
>items can stack crit, so you can get 10%+ crit chance if you go for it
>sticky/slowing grenades that affect an area and it works in PVP
>the super hot party members must be in my party
>Haste/speed buff/insane attack speed
>rooting enemies to the ground
>passive health regeneration
I remember when Rift first came out, I played a saboteur, which had sticky bombs that had like a 6 yard radius, and they were so broken in PVP that they nerfed them. That's probably the ONLY time I've experience something I'm doing getting nerfed.
I could not care less about playing the way other people tell me to play. I'll just play something else that is actually fun.