Oh how World of Warcraft was my life. Spent my entire time dedicated to Arenas(2s & 3s) for about 5 years. Although I never really got that deeply into retail, I had a couple of maxed characters up until cataclysm on WoW then gave up on retail and completely moved onto PvP dedicated private servers. Managed to accomplish Gladiator rank(rank 1 in 2s/3s) on a couple servers playing as Holy Paladin / Resto Druid.
5.0.5 Must of been the most fun patch I have ever played on, the start of MOP. It was so broken where you could literally kill people in 3 hits unless you were somewhat a decent healer. Had a ton of run playing resto druid in this patch, only decent healer I could play as to avoid brutal hits with the amount of kiting ability I had.. Then hunter became broken upon this patch being able to hit 600k+ crits. :L Ah the days.
It's sad that they pretty much ruined the PvP side of WoW, although it seems like they are trying to regain and fix it... I just can't see it ever feeling the same as it was back in it's glory days, I still wish I could hop back on and enjoy it but that'll never happen again.