So what are y'all's favorite/least favorite levels from Kazooie/Tooie? WitchyWorld is probably my favorite overall. I like the theme since I'm an amusement park nut and the variation it brings. The music is also fire. My favorite in Kazooie though is probably Mad Monster Mansion for its atmosphere and charm.
As for my least favorite in Tooie, it's probably Terrydactyland (I actually like how puzzle like Grunty Industries is). For Kazooie, definitely Freezeezy Peak. All those snowball throwing snowmen and cold water was really annoying.
Kazooie's favorite: Click Clock Wood. I like them all, but Click Clock Wood is somewhat emotional and that really puts it above everything else. The beautiful music with the critters singing, the alternance of seasons with all the wood's inhabitants progressing with their lives, the gags in Mumbo's hut in summer and autumn, the vivid colors... it really looks like a fairy tale. And finally, that sense of loneliness you get in winter when nobody's there anymore. The seasons gimmick is also very interesting from a gameplay perspective, some of the jiggies are really clever. A masterpiece.
Least favorite: eeerrr... Mumbo's Mountain? This is kind of cheating, but yeah.
Tooie's favorite: Grunty's Industries. This level is the sublimination of Tooie's design choices, I think. The world is very big, but it's always pretty easy to know where you are, since every floor is color-coded, so that's a plus. But it's not just big, it's very, veeery complex. You can't even enter inside the factory the first time you reach the level, you have to do that trick with Chuffy. And then you can't explore the factory freely, rather you have to get into it and re-activate all the power generators with the batteries you find around, progressively unlocking new parts of the stage. The way you have to use every move in your arsenal and you have to switch between B&K, solo Banjo, solo Kazooie, Mumbo, and the washing machine really comes together. This is where the adventure aspect really comes together, it's basically a metroidvania. I think this is the direction that the series would have had to take, had it kept on releasing new games. Also, Weldar is an awesome boss and the level's music is catchy.
Least favorite: it has to be Terrydactyland. It has its moments, but it's just too big, too flat and too empty. Navigating Terrydactyland is really boring. Also, the game is really cryptic about some of the things you have to do. And the triceratops family jiggie is a pain. The stomping plains are awesome, though.