How about this? I don't know is this really is psytrance, but I found it on someone that usually uploads psytrance.
Carpe Diem - Snake Charmer (Flute Remix)
My favorite X-Dream track.
Here is my "happy" tracks:
These aren't melodic or to produce happiness though.
Ka-Sol - Waspnest
Dead Dog Barking - Hybris 1939-1945
Doda Hundens Kykra - Spannbalteboogie
I remember when I looked down through the comments of a psytrance track, one person complained when they first tried to get into psytrance, he was put off by the fact that most of it was "commercial bullshit".
Exactly. If psytrance became too commercial, the fullon bassline would be too prominent and that one strange psychedelic acid line would be hated.
(None of the stuff I said made sense at all)
It might be the accessibility in it. Try asking someone that has never listened to psytrance before to listen to Shaolin Wooden Men - Trickster (Just naming one of the most unconventional song I know)
See what reaction you will get.