(Although, in my case, plain Maximino was taken. I like my handle because it’s allitaricious and puts me in good company in this thread, but I am not actually especially mighty.)
While Sue Duhnym, Captain Amazing, Spiritus Mundi, Jack Batty, Cajun Man, Wicked Blue, Darwin’s Finch, Some Guy, and Terminus Est are correct about the spacing, they all forgot that the ENTIRE first word should be capitalized. Now guys, we are supposed to be fighting ignorance here, not spreading it.
Harking back to the original post, allow me to hazard a few guesses.
Underscore_People such as bean_shadow really wanted to be Hyphen-People, but Hyphen-People are not allowed in here. Thus bean-shadow became bean_shadow.
Space People such as Cajun Man have it right. They lurked awhile before registering and saw that spaces were good.
JoinedUpWordPeople like Weirddave are either Weird or they didn’t lurk long enough to discover that Space People were admitted. Note the lack of a capital ‘D’ in dave. That’s definitely Weird.
lowercasepeople like iampunha like to use small letters because they don’t have to chop and change between CaSeS.
Unlike TheLoadedDog, I think that AbbySthrnAccent and FairyChatMom knew about spaces but decided not to use them. I like that.
There are a few of Dopers who worry me, as follows:
waterj2 ShibbOleth ITR champion dwyr (not one vowel!)
These are completely non-standard and the Moderator should do something about them immediately.
The most memorable and efficient names are those which employ a Capital Letter at the beginning and have exactly 11 characters in one word. I don’t have a cite for this so my word will have suffice.