hrmm, i'm late to the subject.. but i just overclock to push things to the limit, get more out of what i paid for.. and as a big oc'r in this community i know i got more than what i paid for based on my benchmarks.. getting higher 3dmark06 than a gtx (based on some review sites)
and yes.. its fun while booting.. wondering.. is it gonna boot?!?!? i always love doing that.... and when it does, oh its a world of joy