I have been getting samples of pre's and trying various things. I really actually liked NOxplode. I couldn't say as I really felt it at all until I started exerting myself. C4 wasn't too bad either.
I don't do too bad with stims. Caffeine doesn't bother me much. I have to ingest an assload of it for it to really bother me.
Hell I can drink a handful of sugar free red bull's and it doesn't affect me other than feeling awake.
I love NO Explode's effects, but hate the taste and bloated nausea it causes me. If that could be fixed I'd never use anything else. Pumps are superior to all other PWOs IMO.