I tried several username like atul, atulaggarwal, but these username are mostly not available on webmail or blogging sites.
Also I tried to annomize my username and choose sylar from Hero tv serial but that username is also not available. My aim was to choose a username which gets almost everywhere available and hence finally decided to use atulagrwl as my username.
I registed this username on gmail and got the email account, same is the case with freenode (irc) and even, i got this username for the wordpress blog. So I have decided to use this username for all my future registration. I am still using another gmail account as my primary gmail account but plan to move to atul.agrwl gmail account soon.