I have a strange, but awesome feeling of elation afterwards, like a delirious sort of feeling, like I'm full of light, or rising air. This has always happened to me when I successfully meditate or have experiences like that though.
Also, head pressure happens consistently. It seems to be specifically around my forehead though for whatever reason, or I can feel it the most there. I also generally feel very tired afterwards, relaxed, something like that, like I could go to sleep, which is something I never feel in the middle of the way outside of when I have just forced. I would imagine the kind of processing your mind has to do to cope with the demands of creating a sentient lifeform would be pretty stressful though, so it kind of makes sense.