They are catchy. Tired of Having Sex is an all time favourite.
I'm listening to (not much change):
Foster the People (Lonely Hearts Club tracks, though I don't have the album yet) Phoenix (Bankrupt from a few years ago, my daughter reminded of their mind blowing pop on my last trip home) (Insert "classic rock" 90s alternative band name here)
I liked the first couple of albums I heard in the 90s well enough but never really kept up with them. I think folks are fans of Maynard and his antics as much as they are any of his bands. Dude is a remarkably intense performer & for whatever reason people are all over it.
Like I said, you either like Tool or you don't at this point. Their sound hasn't changed much. They are considered progressive rock/metal, which generally isn't for everybody (like Diabolical). See also, Rush and Yes.
I saw an interview with Maynard recently. I had no idea that he was in the Army as a surveyor. He is in 2 other bands besides Tool.