What do you make of this love/sex life?

People always tell me I'm shallow or a man whore and I think that's ridiculous. Please tell me what you think and don't be too judgmental.

So my first taste was a girl I met at work senior year of high school. We were kinda close for a few months and over the summer I tried to break the ice and asked her politely for sex. She seemed scared and eventually started crying and hasn't seen me since except at work but she avoids me and won't respond to any of my calls or texts.

First year of college now, I meet another nice girl my age, and she seemed very slutty to me. Only a week in and the third time I saw here, we had sex and I think we both enjoyed it especially myself. 5 or 6 more times of meeting later and I caught here showing signs if intimacy with another guy. She seemed upset and thought I would hate her but I said I didn't mind if she still had sex with me on the regular. People have called me shallow for staying with her and i don't see the problem. I have also had 2 or 3 other hook-up type partners who I saw maybe once a month or so throughout college and now I am 25. I still keep in contact with a few hookups from then but see them rarely and have left the one I knew well and met first go completely(she didn't care) because I have since moved a way for work. I have since met two other women and it seems that they think I'm shallow for wanting sex and refusing to give up other partners I have for their sake. I never want to get married or have kids and even don't really see the long term value of a 'close' relationship, I just want my sex, badly. And I have it with people who are attracted to me and know that's all I want also. It is my choice to love this way and I have enjoyed it. What do you guys think?? Am I super shallow or is it just my preference?