To me it feels exceptionally awake and aware. I can feel my heart beating and hear my breath. I feel like I could chase down a woolly mammoth for dinner or run like hell to avoid being dinner for a saber toothed tiger.
Keto-land has been my permanent home for a while now so this feeling has become the new normal. I wouldn't want to go back to life without it. This is why I wonder at all the people saying how the cookies at the office are such a "temptation", etc. I am not in the least tempted. Why would I want to leave this awesome place even temporarily? For a cookie? Why?
Also being in ketosis for me means perfect seizure control on 25% less medication than before and I plan to cut that back further gradually. The medication I'm cutting back is a barbiturate so getting some of that out of my system is an added bonus.
And I hope what you said about cancer cells is true as well. Five and a half years cancer free and planning to stay that way.