I'm sure I'll get slammed but I love the Sponge Monkeys from Quiznos. Especially when they say "Beware of Papercuts". That is just hilarious. I also am a big fan of "Wingman" -- I find myself singing that song quite a bit (the ill-executed, "Wingdog", while brilliant in theory sucked a bit in actuality).
As for inspiration -- a few Olympics ago, there was a commercial for the Post Office where the family mailed the Athlete a "10" sign to encourage them. I got teary on that one.
But all time favorite -- looks like Italian square, man and woman walking and the man yells "I LOVE THIS WOMAN". Shermy tries to do that to me all the time cause I'm such a cheeseball ... but usually he just gets punched in the neck.