Oblique is very classic, can’t go wrong.
However, I’m usually fascinated by the seasonal pieces. If you currently have any seasonal ones you really love, I recommend going for it!
I have one of each...the small in oblique and the large in tdj. BUT...when i got the oblique they had it in a cornflower blue color so it is a bit more unique than the normal blue. Maybe go that route so it's the best combo of classic but not the same as everyone else?