Not bad for your first signature. I definitely do like the concept of it. It's simple yet has a great feel to it. The only thing is the text.. It could totally be better.
It looks prety good. The moon looks kinda weird though (choppy edges, maybe take out the drop shadow?) And add a border. I think It'd look nicer
definitely not bad for a first sig but if you want to keep improving read up some tuts and get loadsss of info. psds are good too.
Nice for your first, since the first tag i ever made, was a dude from UT 2003 and some color dots with a brush of 60 px next to it So GJ