I have yet to use DNP but unless the sweating gets too bad (I'm a profuse sweater as is, I often leave the gym with sweat dripping out of my pants and sweat starting to foam on top my pants, kinda sexy huh) it will be the only fat burner I'll ever use again.
T3, Clen = not worth the hassle imo. (and not THAT effective neither) I'd rather just cut calories some more and up suffering less than suffering through the sides of those 2.
OTC fat burners = useless garbage. If you need the caffeine to get going, drink some coffee. That actually has some health benefits too.
And in general like someone before me already said, put things in perspective and don't suffer needlessly for a plastic trophy. (or worse yet, off yourself for a plastic trophy)