Hello!
I'll assume your using Photoshop!
They're all great but I'll leave a few advices nothing serious:
- Make them smaller just a bit they can be 400*150!
- The second and third have great colour, but don't make something so shiny! Try to put a dark colour and a bright one!
- Use a less fuzzy border (I used a few fuzzy borders and they suck most of times)
- Microsoft has awsome fonts you just have to play with them! The last font doesn't match with the sig and it's hard to read! You can use funny fonts with the ones that came with your computer.
Now if you follow these your banners will be awsome!
They're really good for first tries!