I struggle with "AwesomeFeelsMan" 'coz my first thoughts were AwesomeMan, which was already used a lot. And then I have to worry about how people would address me, I came up with Feels but the problem is I've separated myself from the character that uses that name and made my own unique avatar to represent me.
Stick with a name that best represents you and the number should be a special number. People could address you with your username but if you want you can just tell them to call you by your real nickname. (Or another short nickname)
Own it, a name is only a name until you show who is owning that name. People might know two guys named Rick but they'll always have different feelings for the both of them. In my opinion, having a unique name is not at all necessary but giving that username a personality (you) that would give an impression on people is undoubtedly something to consider.
Having a username like "OverEdgeLord" might make people think you're like an edgy person (I like that name, I might use it for a villain
) but that's where that old saying "Don't judge a book by it's cover" comes to mind. Let everyone read your stories, let their opinions be opinions, what matters is you love that name and it means a lot to you. That's more important.