I love Volume One much more than Volume Two, evident by the number of times I've seen 1 (about 7) compared to 2 (3 times).
One really underrated sequence in Vol 1 is the whole part where the Bride first lets Hattori Hanzo know she's come to meet him, upto the point he gives her the sword. It's a really soulful part of the film and you really feel the significance that owning such a weapon holRAB. Thing is, that sequence gets overshadowed by the rest of the movie (which is nothing short of spectacular), but in any other movie it'd be the highlight, trust me!
Great music throughout, soundtracks are some of the best things about Tarantino movies. Though Death Proof's wasn't as classic as his other ones (4 great tracks on that one though). I'd recommend the Kill Bill soundtracks, I play them all the time!