So I finally killed Yogg Saron (normal 4 watchers, no uberness here) this weekend. I'm a bit sad that it happened on my disc priest before my paladin, but I'm really happy to see the end of this epic fight. Yogg Saron is, for me, the best fight of Wrath up to now, it's 3 very different phases, there is a lot to do for everyone, and especially in 10-Man none is allowed to fumble as we can't tolerate one death or we won't get the enrage timer.
It's really hard to find enough motivated people to finish Ulduar now, but I happened to get lucky on my priest server. I got invited in a guild group extending its tag when they were on Yogg, they wiped on their first night and we wiped again all night on last Thursday. This Saturday, we went there again with nearly the exact same group, everyone knew the fight and we downed Yogg on our second attempt of the night, only our third time on Yogg phase3.
I was the healer of the brain team during phase 2 which is a lot of fun and rush (you don't have much time to think and I fumbled my first brain phases on Thursday). We barely killed him before the time limit though (only 15s remaining) and our tank had 6 adds on him at the end and survived (I love to heal good tanks).
All I can say is that I really like this encounter. It's original, well designed and it reminds me of C'thun :)
I used the BossKillers guide to prepare my raid nights, and it really helped me to not be surprised especially in phase 3 when these guardians hit to hard on the tank (thank you Pain Supression during the last seconds of the fight).