Well, I think girls like loving and caring guys. And you also need to be sweet with them. - Digital -
Mostly girls like humorous and bit romantic person and i think boys also like those girls. but All things must remain in limits. Honesty matters more than serious attitude.
I dont like serious people in general (i dont say u should always be smiley face but...) so that answer to ur Q.
its depend on you but most of the girls like serial guys and not the funny like me the girls also noticed that how much respect he gives to me.