Creating an account is free and hopefully easy. The general idea is that you fill out this thing and then it does stuff and yeah. You will be able to login with either your username or email when you are done.
Profile pictures are automatically pulled from Gravatar so if you use that and want that then use an email address that has a gravatar assigned to it.
Why make an account? Well, here is a short list.
- You'll be able to find links to old stuff you posted.
- You'll be able to mark things as private and restrict who can see things.
- You'll be able to use the API with assigned API keys.
- Because it would be awesome.