Depends on how 'thin' you are?
If its just exercise causing your thinness, and not bulimia and smoking, then I think it looks great.
But if its negative influences I think it can veer into Kathy Griffin or Kathie Lee Gifford territory easily. Your face and skin will look old and weathered. Wrinkles will be deep and cavernous (even with fillers). You just look worn out.
