I like to use coretemp and realtemp to monitor my temps with. I personaly dont care about the infamous 12 hour standard of prime95. If I get no errors in two hours, I know that no game is ever going to bluescreen my PC. I overclock for practiaclity. I'm not a performance junkie. Nothing against those who are. If thats your thing, more power to you. I like to find a moderate stable overclock and then I just go with it. I may decide to push my i5 to the limit in a few years when I will need the extra performance to keep up with the games of the time. But for now, I'm sticking with my 4.3 because its more than enough horse power for current games.
So, its up to you to decide wether your hobby is gaming or its overclocking. Or maybe its both? Nothing wrong with that.