I thought about opening an art thread here for quite some time, so here goes...
Here are some banners I made in the very beginning of my art shop :
Here's the result of some tutorial I followed a while back :
And here are some random banners I like :
Here's the secret santa I made for this year:
Some of my most recent banners:
C&C is really welcome, especially on my most recent banners.
I'll update this thread regularly. Everything in this thread is free to use as long as you don't claim it as your own.