the first time i went into karazhan was with my small group of RL friends and random people we met in game. we were <Attrition>, and only 1 of us had any endgame experience. the rest of us were noobs lawl (myself def included).
we wiped multiple times on attumen and quickly became frustrated with the quick respawn rate of his adds. so we left. we came back at the end of the week, only to find one of our members had given his raid ID to one of the top guilds on the server! but they had skipped netherspite, and i was told he's probably the hardest boss in there. so we went in and gave him a shot, and a couple hours later, we downed him! it was such an exciting and rewarding experience, i couldn't wait to get back in there the next week.
those were my favorite times raiding, before i really knew how to heal, before i knew how game mechanics worked, before i knew pretty much anything, back when we were just a bunch of friends spending a couple nights a week killing shit and laughing the whole time in vent. karazhan is still my favorite instance, and i can't wait to learn it from the MT role