I have been into bdsm for over a decade now. First discovered it when I was 15 and started actively participating once I was an adult. Over my time in the lifestyle I have been able to narrow down that I am interested in D/s (with some Daddy Dom tendencies involved too) that extends well beyond the bedroom.
As for kinks I like that is a long list but a few would be servitude, bondage, humiliation, anal, degradation, denial and over stimulation to name a few (bdsm checklist is below for everything). This can all be discussed privately because it is private. Not everyone deserves to know the details.
What I look for in a sub: Someone friendly and feminine. A peaceful, calm, soft presence about her that is pleasant to be around and not argumentative or masculine in energy. A healthy lifestyle is important as well, no smoking, drinking, drug use or other things that could be considered an addiction.
A sub who is understanding and supportive of the goals I am currently working towards and does not bring any additional drama/chaos/stress to my life. I cannot emphasize enough how important a healthy, peaceful personality and presence is to me.
I'd prefer an IRL relationship but for the right person long distance is okay at the start while trust is being built.