For one thing I would capitalize the 'd' and place an underscore between the name and 'xp' because apparently it's read as dark-no-vax-pee. Darknova_XP looks much better.
Imperator Danknovaxperaux Divi filius Imp XIII Pont Max Trib Pot XLIX Cos CXVI Primus Signiferi Box-xy Princeps Moderatores Pater Forum
i never liked my name i made when the ps3 release in 12th month of 2006, i wish i could change it one more time but if name change abilitiy happens then this would be my choice
Personally I would not change my ID. I've had this ID in one shape or another for nearly 15 years online. My ID pretty well defines me online and on the PSN. People know what to expect out of me. If I were to change that, it'd be like entering Witness Protection. I tried to use a new PSN ID and I couldn't do it for long. Too much vested in this ID.
Just me though.
Simply, something short, but sweet.