Is there a such thing a guy being too nice? How to become a little more aggressive?

[Locus]

I was reading through some articles online saying being too nice had bad sides. When I read some of them it does reflect me like how I will agree with everything and I didn't know niceness can make you look desperate like "not reject me I will do anything" quote. I heard affects the ability for a guy to have sex with women probably explain why I'm a 25 year old virgin, hopefully I don't become the true 40 year old virgin, I do wanna enjoy sex in my young years. Example of me trying to please a girl is like if she wants to go somewhere and I just agree. Pretty much agree with everything. When it comes to think of it I think it makes sense. This is me I buy girls things, treat her out, do things for them, and other things that a nice guy would do. I would like to know how I can be a little more aggressive but not so aggressive where it's unattractive and girls will not want to date me. I heard some girls like it aggressive in the bedroom that I can't say because I never had sex with a woman before. Women and guys what would you recommend me to do?