Yuki did the compositions for Fate/Zero by the way (Same composer for SAO)
If you ever want to check out another VRMMO (that's good) watch .hack//Sign, coincidentally, Yuki is also the same composer for the soundtrack.
In my opinion, Yuki did the best job on .hack//Sign with Madoka Magica very close behind. If you like Fate/Zero you should check out Madoka Magica also, it was created by the same person. In terms of anime composers however, I loved Satoru Kosaki and Joe Hisaishi a bit more.
Thanks. I plan to marathon SAO and AoT and Fate/Zero with my friend after our SAT (should take a while, about 29 hours all on blu-ray and subbed). I can add that on to our list, we're probably going to watch Angel Beats (my brother watched it and apparently its really sad that it makes you cry at the ending lol). But I won't listen to those songs until after I watch the show. I guess its weird but I like to listen to the soundtracks after I finish the series so I can make connections and remember the scenes that they came in lol. That's why I like those two songs (the SAO one because it was during the romantic-ish episodes) and the AoT one because it came in multiple epic scenes lol. (don't want to spoil them).