HECK YES. I might just have to get a very short membership just to change mine.
If you didn't know, I'm known as Troutfish on basically every other website, but since I made my dA account 5 years ago along with my YouTube account, these sites have me under different names. Now that more people know me as simply LaMae instead of Merry-go-Roundabout though, I think I could change my username for my own ease of mind and no one should be too confused. Especially since I made this journal!