Back in BC our guild used SK. It was alright, but I remember passing on a lot of little upgrades that really could have helped, but I was always holding out for a big one.

I was incredibly behind my friends in content and wasn't allowed to go to SSC or anything for a long time because I just had the worst luck with drops, no matter what I ran. My husband's character, which was just as old as mine, got to go to everything because he actually got drops and they needed the chain heals. I ran Kara and Gruul's Lair so many times that it wasn't funny, months and months of horrible waiting. And it wasn't fun, because the guild leader and his wife (rl friends) tended to ignore me in game, and never wanted to do anything with me outside of having me help them gear up their other members so that they could personally progress. But I always showed up, and there was always a pugger or two, (and SK sucks for pugs, who were told that there was no way that they were ever getting gear unless no one else wanted it).

I eventually got to go to SSC once and the Eye, (when they couldn't pug anyone better), and I had been on top of SK for so long. I was waiting for my... (shoes? I could have sworn it was shoes, but wowhead says that they don't drop off trash. Must have been the bracers.) Well, my memory says it was the Star-Strider Boots that dropped off of random trash, (which again, http://www.wowwiki.com/The_Eye_loot says can't happen, but that's what I remember). Anyway, my long awaited upgrade dropped... and I didn't get to use my ticket. Since whatever dropped off of random trash it was regarded as useless and got auto rolled, which I lost. (This was common in Kara, as all the random purples were pretty much junk, but this was still a very sizable upgrade and the only one I had seen in a loooong time).

I tried to talk to the guild leader and his wife but they said "What's done is done". After I proved that it had been my only hope of getting out of that one green I had been wearing forever in that entire instance, they said, "Well, what do you want me to do about it?" And I was pretty much barred from raiding after that because they had two better geared hunters that they wanted to focus on more.

I haven't raided since.

(TL;DR) Random rolls. I like those best. That or a loot master that is using a large spreadsheet to make sure the group as a whole is getting upgraded optimally so that they can move on together. And beware of fair weather friends.