Why did you become interested in BDSM or other kinky sex?

I found BDSM at a young age - too young to participate, but still interested. I learned as much as I could (roles, consent, limits, advocating, things like that), and when I turned 18, I took a deep dive. For me, it wasn't (and still isn't) about the sex - it was about fulfilling my needs.

For example:
In a relationship, I'd like to give up a lot of control and give it to my partner.
In sex, I like to be hurt.
During scenes, I'd like my partner to be in control, doing whatever they want to me (within my limits).

I second what sevennn has said. I'd say (D) and (E) fit the best for me.
Kink has always been a part of sexuality for me, even when I was too young to act on that sexuality and was still figuring things out. I find that BDSM does offer more to me than vanilla sex, in terms of all the different types of sensations - from impact play to fire play, there's always something that can add to the experience. I don't need a full-on sex dungeon or even a heavy scene, but sex probably wouldn't interest me much if there wasn't at least a little bit of kink involved.
Kink also offers different mental/emotional "sensations." Not to dunk on vanilla sex, but as someone who isn't in a relationship, I don't find much appealing about having vanilla one-night stands or whatever. In my experience the sex is not good and there is no kind of connection (for lack of a better word) - no discussion of interests/limits, no aftercare, etc. If I'm going to have sex with someone else, they have to be bringing a little more to the table, you know? I'm not very interested in sex to begin with, so for me, kink is more tempting in that it can fulfill more than just sexual urges. If ALL I want is an orgasm, I have *more* than enough toys to make that happen by myself.
That said I definitely also am kinky even when getting myself off, so I do think some of it is just inherently what I find hot or appealing, in the same way that vanilla people have their own preferences and turn-ons. I don't think of it as a binary of "vanilla" vs. "kinky," it's more like a spectrum.

I think they are the best thing every