Most Helpful Girl
"Skinny personality"? LOL
-Button down shirts. Not necessarily ones that are super formal. Flannels can look good too.
-T-shirts that show off your build.
-Knit sweaters (especially with a collared shirt underneath)
This last one could just be me, but cardigans are pretty nice.
Honestly, just wear something that you like and look good in. That would be your best bet.