
These cards from Dauphine Press were the ones I chose. I loved the deep red and chartreuse green (a bit Christmas-ish, but not obviously so), and I loved the classic design.
If you're interested in doing the same thing (even if its just for a few closest friends) here are some of my other favorite 'thank you' cards I found along the way...

From left to right: ilee birds thank you (a favorite of mine, this gal is from Seattle and her desk calendars are my favorite), also from Dauphine a pretty little pattern. Spell it out for them with a definition from Sapling Press. A sweet modern piece from Michelle Brusegaard, and what might be the best boxed deal, a set of assorted birdie thank yous from turtle papers.
Another favorite for sending a little love anytime...

from EnfinLaViola.