I never really cared for Tool until Lateralus was released. The entire album is amazing. 10,000 Days is decent also, but just isn't quite as mind blowing as Lateralus.
I've never understood how people can listen to Aenima. I can't listen to a single song on that album all the way through without shutting it off. To each his own.
One of my favorite bands of all time. I've seen them 3 times (Aenima, Lateralus and 10,000 Days tours).
My favorite song is Eulogy, but my favorite album is probably Lateralus...Due in large part to the fact that seeing them at Deer Ditch(Verizon) changed the way I listened to music...That was one of the most entertaining ~3 hours of my life.
Wore the print off of the cassettes of Undertow and Aenima, but never really got much into Lateralus and 10,000. Some favorite tracks are aenima, eulogy, h., 46 & 2, prison sex, undertow, 4 degrees, and hooker with a penis.