Do you have a single username you feel attached to?
Or do you like to use different names for different occasions?
Edit two and a half days later:
Thank you all for answering my question! It was so interesting and fun to read all of your responses.
I really appreciate you for taking the time to write.
I have a couple of usernames that I have used - or, more often, used variations of - for quite some time over a range of sites. However, it is not so much that I am attached to them as such. It is more that I can’t be arsed to come up with something new each time.