Probably someone already mentioned it but it would be awesome if players could choose theme of the character select screen with it's original music. I've been playing GW2 for 7 years now and every bit of nostalgic impulse (watching old trailers, redoing some old stuff with new players etc.) is making burnout fade away. And sometimes I'm so burned out that I only log in for daily completion.
Yeah I know you can do this trick with changing system date but it's not the same.