Or green peppers...
Or both!
Though...I dunno how well bell peppers would work in a pot, just because they're so big.
My cherry tomatoes did really well, too...but I don't know if you like those or not. They smell so good, even if you don't like raw tomatoes! And they're purty.
I wish the ground wasn't frozen solid! I'd love to bring a few of each of my herbs. I'm going to miss my little herb garden. *snif* But those are something we could almost certainly do on a balcony. Just won't be the descendents of my own, that's all!