I've gone through Minim's Holiday '95 pack and picked a few levels. I've avoided the ones that are just long building exercises, since they don't really offer much of a challenge nowadays and are somewhat tedious. I also chose a few that, while relatively simple, had some nice talisman potential. I'm up to 22 levels now, with 10 talismans (5 Bronze, 3 Silver, 2 Gold).
Also, anyone got suggestions for Christmassy music? So far, the only real Christmas tune that I've been using is the Christmas mix song (a remix of Jingle Bells, A Spaceman Came Travelling, The Twelve Days of Christmas and The First Noel) that appears in Revenge of the Lemmings.
Levels I chose from Minim:
All over the place
Another cold day
Down the middle II (renamed to "Down the Chimney!")
Lems come out to play
More Lemming Drops
Stocking Lemmings