(Or at least the ones I could get on film/video)
I've always favored the Disney Characters as being the most unique walkarounds in the history of live costumed entertainment (it's got to be the personality). Below are some of the more memorable character moments of mine dating as far back as 1991, and broken up into different sections.
First batch of Fab Favorites

MICKEY
& MINNIE MOUSE (1991)
Nice set of bookends, eh? No Disney Character page is complete
without these two. (even if they do appear on my video stills
page; DEAL WITH IT!)
GOOFY
(1991)
For the 3,976,428 billionth time, WE ARE NOT
RELATED, DAMNIT! (Whoops! I can't say that word on a Disney page.
^_^*)
PLUTO (1991)
DOGGIE! EEeeeEeeEE!!!! (*throws out a look* What? :P)

CHIP & DALE (1991)
Wow, another set of bookends! Kinda makes ya wish Rescue
Rangers was still back on the air. (Say, shouldn't Chip be the
one in mid shot and Dale in the long shot?)