You can really make your Twitter your own by making a few changes. Here is just a quick tutorial on how to change your background. Mainly because someone asked me how and it’s pretty hard to explain in 140 characters. I thought if I put it here then it may help others too.
I’m not sure if you can do it on your smart phone, but this is showing you how to on a laptop/mac/pc. This is how it happens on mine anyway.
Here is a step by step guide - and a little picture to help you see where I'm talking about.