Yeah Leafly is great, although I do get the occasional bit of criticism for citing it too much. I like it because it is so accessible - it's as easy as typing a strain name into Google and the Leafly page will often tell you its parents, effects and more.
Seedfinder.eu is another good one for European genetics. Some of our newer strains aren't on Leafly yet.
Also worth mentioning that every phenotype can come out slightly different and that there is no guarantee under prohibition that you're getting what the dealer says it is, but at least it gives us an idea!
You're right man, I tend to avoid strong sativas in the evening as well if I want to sleep :D
Dry mouth is another issue from some strains but I find I get it less these days, especially since kicking the tobacco habit!
Cheers