It makes no difference at all
"What's your email address?" is one of my most frequently asked questions. I'm much more of a typer than a talker, so dealing with people via email is ideal for me. One thing I've noticed, however, is the number of people who needlessly place a 'dot' in the middle of their Gmail address.
For example, "email@example.com".
I discovered a few years ago, purely by accident, that there's no need to put the dot in there. Gmail ignores periods altogether, meaning your address could be: firstname.lastname@example.org.
If you wanted, although I don't know why you would, you could place a period after every letter in your name and your mail will still arrive.
While this is not quite a life-altering discovery, it's good to know! So take the time to ditch the dot!