I tried to use some more masculine colours as that's a weak spot for me. I used the stamp set "Season of Friendship" from Stampin' Up. The hearts I did in green because that's the colour of health notification which "ticks" when you're being healed by a HoT. That and pink really would have clashed!
On the inside of the card I considered stamping, "Won't you Tank for me?" but decided to leave it blank instead.
Thank you again to the members of WoW Ladies who have contributed ideas in this post.