Originally Posted by Everwaken^

Pretty much what mine looks like:

Addons:
Grid
GridStatusHealer
GridManaBars

Border: Aggro
Bar: Health Bar
Top Center Text: Name
Bottom Center Text: Missing HP, Dead, Offline, Feign Death/etc...
Center Icon: Poison/Magic/Disease debuff
Top Left: Aggro(even though I don't really need it :P)
Top Right: My Target
Bottom Left: Incoming Heal
Bottom Right: Healing Priority
Bottom: Mana Bar(hidden if it's a rogue/warrior)