My favorite?
I don't really have a favorite but i have a top 10 (In somewhat no particular order):
1. Dual Sanitronic 80 (because it's the basis for Kirby from brave little toaster)
2. 1C (the headlight hood is just really cool)
3 Tradition (My uncle has one, and it was lent to my parents when i was still a baby)
4. Late model Sentria (from 2011 or 2012 with new style emtor and style f bags; I own one myself!)
5. Avalir with red trim (bag clamp, bag top, and i think the carry handle too)
6 Kirby Legend II (I just love the red)
7. GSix (Not sure which one, I don't know the difference between the original and the 2000 and 2001 limited editions, but I love the black)
8. Classic III (There's something about a Kirby and the color red that makes them look nice)
9. Heritage legend
10. Comvac 1600 (the Belt cover is VERY cool)
Fun fact: the guy who voiced Kirby in The Brave Little Toaster is the late Thurl Ravenscroft. He did plenty of work for Disney, some from when Walt was still alive. He was also the voice of Tony the Tiger, the singer for "You're a Mean One Mr. Grinch", and part of the Mellomen who as I read, at least once sang backup for Elvis Presley and also recorded for Walt Disney for his Enchanted Tiki room. (I am a hardcore Disney Fanatic, that's how I know this)