I have started the process of retiring an age old username/alias that I have been using since I was 15-16 years old.
That username/alias consisted of the first three letters from my first and last name i.e. Alexander Graham Bell would be alebel.
However, I am now going to use my entire first name followed by the first letter of my middle and last name i.e. alexandergb
So far the conversion process has been going well and I have not run into any drawbacks just yet.