My username combines my first name and a nearby street.
The street name carries connotations (like Soho in NYC), and it reflects the sort of person I am, the type of interests I have, etc.
It also gives the message that you’re serious about looking for love online. You are selling your lifestyle, and you want it to seem as attractive and aspirational to people as possible.
As someone who has been an online dating coach since 2003, I’d venture to guess that I’ve not only seen more usernames than just about anyone on the planet, but I’ve written more of them as well.
Why do I think that usernames make a difference, when everyone knows that it’s all about the profile and photo?
Also, make sure the location suits your personality.
If you love walking around the South Bank or along the river at weekends, include some photos that show you doing just that.