I had several bad instances with heroics in Cataclysm, starting in the beta. I'm not the fastest person on the uptake with understanding what is going on during and encounter aside from the basics like "oops, standing in fire" or "oops, bass just targeted me by name."
I did my first COMPLETE (well almost, we skipped some bossed in Heroic HoO) tonight. The only other heroic I've ALMOST completed was Grim Batol, but the last boss was too much for me and the party I was with. About the time I was going to say "GL, I'm out cause I'm not getting it" i got the boot. That was on my warrior doing DPS as Arms spec. I did great on the trash, and respectable on the first bosses, but just could not get the last boss figured out. being tired didn't help - we had been through a number of players failing/bailing by the the time we got the the end boss.
In HoO tonight I took a chance with my mage Rizzir, who I'm finding fun to play as a fire mage. I hated fire in early Wrath, kept going OOM and getting PWN'd by everything - frost ruled for leveling! Not that I'm great with consistently high DPS, I've got the general sense of how to play a fire mage and was doing near top DPS - then again, my mage is geared on par with my warrior, or slightly better since I splurged on some 'relatively' cheap epic cloth items from the auction house. I'm pretty sure my warrior has only one piece of crafted epic armor.
Still having fun leveling my rogues - one is 62 the other is 75.
I could insta-queue with my warrior, but I just don't feel like tanking....blah. Not sure if the new call to arms for needed specs (i.e. TANKS) will get me more interested, but for now I'm not feeling it, and not feeling bad about it either. There's sooo many quests out there I have yet to get to. I FINALLY finished the Vash'Jir line on ONE of my toons. My highly geared mage of all toons....the quest lines there were fun, but way to long to get the "payoff" of a getting to quests within the *cough, cough* level 80 instance Throne of Tides. I wonder if very many people ever did those quests and actually used the gear they got from them. I might make it a point to try to get my rogues there...but I doubt it.