I like strong sativa strains. I have a couple favorites. I like to eat RSO/phoenix tears. Sure, there is some sleepiness that occurs once the THC converts in the liver, which does not happen when you are smoking, but I will simply have some caffeine if I can't go to sleep at that time.
I find that the euphoria induced makes me very creative, positive, and upbeat. I get a lot done, and have great ideas that I take forward in the future. It is very very useful, and has allowed me to have some important breakthroughs.