I remember 7ish years ago when I first started playing, my friends already had the game and picked sylvari, so I picked that too to play along with them. I was also torn between playing guardian or necromancer, as they both seemed really stylish and cool to me. But since sylvari was a given, I felt like a sylvari necromancer seemed to make more sense aesthetically than a sylvari guardian (I was thinking norn guardian before), so I went with that.
7 years later, still playing the same character, although now I'm playing reaper.