Great idea!
Some of my favorite background exercisers:
Cathe's background exercisers, especially Rhonda. She can simultaneously smile and give Cathe "are you
insane?" looks when the going gets tough.
I really like Brenda in S&H because she looks completely focused on what she is doing, and I always smile when Cathe tells us about Brenda's famous biceps!
I've only previewed Strength Express, but I must say that the background exercisers are great! They are having a good time even though they can't do all of the crazy stuff that Mindy is doing.
The Marine in FIRM Vol. 6. Just picture a buff, handsome, Marine Corps type of guy working out on the FIRM mansion set, surrounded by women in pastel leotards. This makes me smile every time!
In yoga videos, almost anyone who is less flexible than I am!
I know there are more...