How should i return the favor ?

Me my boyfriend have a fairly good relationship, we get along, have similar intrests, care about each other etc. There's little we wouldn't do to see the other happy.
Now my boyfriend knows exactly what I like when we are being intimate, such as being...

kissed on the neck, where I like him to put his hands etc.
But I don't know what to do to make him feel as good as he makes me feel. I've tried asking me if there is anything he would like me to do but he just tells me to do whatever I want to do.

Is there anything that most guys enjoy/like when they are making out ?

A lot of guys like for you to play with their hair or rub their chest. It depends on the person, but if he won't give you answers, then just try different things until you find one that works. Good luck!

I've found with my boyfriend that they don't like you to go like RIGHT into it, tease him a bit. take it slow.

well to be honest with you, most of the guys like oral sex but sometimes they don't ask for it because

1) he's shy to ask you
2) or he dosen't know if you like it
3) or he just respect you and doesn't want to be dirty with you

Personally I like it when my girlfriend puts her hand on my neck, butt, and thigh.
Also, there is nothing hotter than an assertive woman. Like the first time we kissed, I was beating around the bush. She put her hand on my cheek and made me look at her and kiss her

definily assertive women are hott, but also kissing/sucking and nibbling on a guys ear sometimes will make him feel very good, I know at least I love when girls do that to me.