It seems to me that in many sites I go to that have people's opinions regarding Tool, everyone's focus seems to be on Lateralus and Aenema. These are everyone's favourite albums and the topic of so many dicussions. I'm wondering "What about Undertow?" I love Aenema and Lateralus is also a great album, but I find that Undertow is very much underated or underappreciated. Personally, I find it hard to choose my favourite Tool album because they are all so unique, but for all the thought I've given it, I think that Undertow would have to be it for me.
(To be clear, I definitely do not avoid Opiate and Salival...in fact Opiate is also a love of mine. Just making one observation here.)