So, I'm getting an Xbox 360 for Christmas because my Wii died after Black Ops overloaded the disc reader.

I was perfectly happy until my friend was like, "So... What's your Gamertag going to be?"

I was like, "What?"

So, he explained all about it and now I ask you this:

How did you decide on a Gamertag?

What does a normal gamertag look like?

Can you have spaces in your gamertag?

(and any other stuff you can think of to tell me that I should know)

Sorry for being such a total n00b at Xbox but I've never really had much time with one before.