The first app I open in the morning and that last app I check at night is iStock Manager. Next to that would be the TV.com app but honestly, if a phone platform didn't offer ISM, I wouldn't buy that phone.
Helix Launcher 2
Meebo IM
Seesmic
Facebook
Air Control
Opera Mini
Break The Blocks
Google Maps
Knocking Live
Advanced Task Killer
Astro File
Raging Thunder 2
well since your giving away 10 otterbox covers I guess I should give my 10 favorite/most used in no paticular order
Astro
Dolphin browser
Walkie talkie (push to talk) saves me from having to text and saves minutes on non verizon friends
Nfl mobile
Meridian music player
Easy tether
Advanced task killer
Of course the android community app (no brainer)
imusic
Pandora
Radio time/I heart radio for live radio around the country/world
Ok that's more then 10 but honorable mentions would have to be
Ringdroid
Swype
Helix launcher
Beautiful widgets
Youmail
And how could I forget twidroid the best twitter client hands down