Here are two sketches that I recently got framed (picked them up from the frame shop last week, but haven't had time to hang them up yet).
First one is a Hulk sketch by Simon Williams (works for Marvel UK). I had it double-matted in green and purple. This picture really doesn't do the green matting justice (I tried to get a lot of light in the room, but didn't want to use the flash on my digital camera).
This is a Hulk vs. Thing sketch, also by Simon Williams. Double-matted in orange and green. I was VERY nervous about orange being the main color, but I like how it turned out. (Sorry for the angle of the pic - I was trying to get close enough to the pic so that you can see, but it cut off part of the frame. Oh well.)
And finally, my first piece of "true" original art! I actually bought this for my wfe - she loves Batman, and loves the Joker, so I was able to find some original coloring book art and surprise her with it! Very affordable way to dip my toe into the pool of original art. Artist is Loston Wallace. Double-matted in reflective silver (not sure if you can tell from the picture) and black. I'm VERY happy w/ how it turned out, and my wife was VERY surprised and very happy.
Here's a close-up of the art itself.
(Thank goodness for coupons for framing at Michael's! That week, they had a "Bring 3 pieces, get 60% off!" special. Woo hoo!)