I'll throw my experience into the pot in case it ever helps anyone feel less alienated.
When it comes to masturbation, I don't think I've ever had a 'normal' sex fantasy in all of my life. I am also never in any of my fantasies, nothing is ever from a first person perspective. The theme of forced sex and general BDSM stuff is pretty common. Also the more surreal it is, the more I tend to be drawn to it (mythological beings, humanoid aliens, supernatural beings, anime-style fantasies - pretty much anything except actual, normal humans).
There is also a massive, massive disconnect between my sexuality and my emotional self. To the point where if I found out a friend of mine was raped, I would likely fly into a bloodthirsty rage; if I read on the news that a rapist is on the loose in my area, I feel fear; then I go to bed at night and masturbate to rape fantasies. What the hell, is all I can say.
When it comes to my actual real-life intimacy attempts with actual real-life people, it gets even more complicated. I tend to be more aggressive myself with a male partner (provided he is okay with it or seems to even like it) but only right up until the would-be sex, and then I just feel sort of freaked out and even grossed-out and back off. It's like my perception of the would-be and the reality of the would-be never quite match up. I find I'd rather just fantasize and make love to myself than actually have anyone participate, no matter how attractive I find them.
Then, as if it's not already enough of a mess, I also develop romantic feelings for women on occasion, but my demeanor towards them radically changes from what it would be towards a male. I actually de-sexualize (I know that's not really a word lol) in my brain and become extremely protective of them. I never fantasize about forcing them to do anything, and actually, again, develop a full-blown white knight complex over them. But the feelings of romance will definitely be there, and I'll really enjoy romancing them in every non-sexual way imaginable.
Right now in my life I don't even attempt to date anymore, because I've at least developed enough self-awareness to realize that it will always be an inevitable train wreck.
So there is my jacked up sexuality.