Is it important for a guy to have muscles?

Girls, I'm curious about something..

recently I've started working out mildly, using Wii Fit and some hand weights and whatnot (no money/time/enough motivation for gym) to improve my health and maybe look more attractive to this girl I have a crush on. Is it really something you look for in a guy to have muscles or like a well-toned body? Or is it just adequate if the guy looks fit and is on the low end of the scale but isn't particularly strong?
Is it important for a guy to have muscles?
Post Opinion