Incubi and Succubi
I'm a little dismayed at the lack of non-medieval-lore "information" about these particular demons..so, let's have a discussion!
What are your personal experiences as one, or with them? Have you met any kin of this type, if so how would you describe them?
Personally, I am part succubus (see avatar ^_^). As a succubus I feel very intertwined with my physical body- I am highly aware of what's going on in there, and I can usually spot a problem and fix it before it has a chance to develop into an illness. I'm very aware of my chakras and the energies immediately surrounding me (my own aura, and whatever energy is floating around).
I seem to have a natural charisma and instinct for the dynamics of love and relationships, so for that reason I often find myself being people's love guru/counselor. I'm also quite calculating, and very practical-minded.
As for the whole psychic/sexual vampire thing - Yes, I've had cases where (while shifted as succubus) I've literally drained men dry. I've had guys come to me afterwards, complaining of how they felt totally lethargic, listless, nauseous, and slept for as long as 2 full days. Fortunately for them, I learned to control it. However I don't consider my entire existence to be for the purpose of draining sex energy and propagating my species through astral rape.
I do find it easiest to astral project while shifted as succubus, and I've had cases of apparently sharing dreams with others (though not sexual ones).
Also, this bit might come off as fluffy but I feel it is a natural ability of the succubus and incubus. I call it glamour magick - the ability to, through whatever psychological or metaphysical means, appear as younger, older, or other slight differences such as eye color, etc. Obviously I can't grow wrinkles or change my skin color, but I have had a lot of experiences with people telling me I look younger or older than I am (depending on my mood, or how I wish to appear) and with well-known people not recognizing me if I don't want them to (without making any physical changes to my appearance). I believe this falls under the same category as "invisibility"- that is, making it so that others will overlook you as part of the scenery.
Similarly, there is no particular way I feel my "true form" looks. I am consistent that it is of humanoid female shape, but everything else - skin color and markings, horns, wings, tail, hooves or claws - changes around a lot. There are a few features that remain similar, but they are not constant...it's more like a general theme.
DISCLAIMER: This is my personal experience. I want yours, too, so we can compare notes.