I'd like to re-post my favorites because I kind of made mine sloppy and combined the original and oh no more lemmings. And I forgot some. (and because I was bored today)
for the Original:best1- The Great Lemming caper
-great challenge and good repeat (unlike some others). There are multiple solutions but they're all difficult to find!
2- No Added colors or Lemmings
-best puzzle in the original game, took me a long, long time to solve it. nice "intro" to digging out a blocker
3- Poor we creatures!
-it's a crystal level, and it's different and interesting.
4- Compression Method 1
-no builders, yay! and a good puzzle especially for me because I never solved the first one this way at all. (I always built up on the right side, by passing the crushers altogether.
5- Last One Out's a rotten egg!
-a good challenge and just fun
worst:1- King of the Castle
-too much like the first one and just generally not interesting to me
2- Hunt the Nessy
3- All the 6's.
-Idk why but I don't care for levels like this, bashing/etc through letters.
4- Curse of the Pharohs
-too much like the first one
5- The Steel Mines of Kessel
-Too much work. and by this point I guess I was just tired of all the repeats.
Oh No More Lemmings:best:1- AAAAAARRRRRRGGGGGH!
-clever idea with delaying/stalling all the lemmings while one does work instead of just trapping all the lemmings in the standard hero level
2- Flow Control
-great "intro" to RR control, and still difficult for an novice player even with the clue in the title
3- There's Madness in the Method
-neat puzzle, for it's time it really was 'madness'
4- Five Alive
-I like having 6 lemmings and it's a difficult puzzle at first.
5- Dolly Dimple
-tough level for it's position but simple yet fun.
worst:1- Almost Nearly Virtual Reality
-boring building level & unlike other's have said, I don't really care for the mono-chrome
2- Pop till you drop
-boring bomb timer with totally stupid no bomb backroute
3- up down or around and around
boring
4- No Problemming!
-stupid, a waste of design work and time imo
5- Ice Ice Lemming
-I don't like all the blocks and basically becomes a standard worker level
Lemmings Revolution:best:1- No Clues Hee Hee
-this one really stumped me for a long time
2- When Two Tribes Go to War
-I like the theme and solution(s) (there are a few) There's also some odd and funny glitches in this level
3- Touch the ground turn around
-so simple yet so difficult (for me when I first played it anyway)
4- Last one to the top
-the solution is somewhat easy but the execution can be difficult and saving 100% is fun. I also like the design and the unusal method used to kill the weasels.
5- Tune In, Turn on, Switch On
-the solution behind this one is really neat, it's the only level in the game where something like this is done. Good use of the new features.
worst:1- all of the two skill tutorials
-did they really need to do this? One tutorial for each skill was enough for original lemmings, this just seems unnessiasary especially considering most people who played this game most-likley were lemmings veterans.
2- Let's Play Catch
-I like time-bomber levels but this one really annoys me, mostly because the terrain (those wood logs) are so uneven and have gaps in them.
3- How do we get up there?
-really annoying time limit, and it doesn't change your solution at all. (without it however the level isn't that bad)
4- Buidld em Up then bring em down
-Just kind of boring. and it doesn't make use of any interesting features of the game, it's better suited for the original game.
5- Ouch me head
-the only interesting way to play this level is to pretend you don't have any diggers