I've been tripping a lot this summer due to my mate getting hold of a bottle of liquid mushrooms.
Although I've really enjoyed these trips in the same way you'd enjoy being pissed, I feel a (connected) sense of increasing disappointment with them. The fact is we're not doing that much (probably not doing enough) – but also I suppose repeated exposure makes that feeling less and less significant and precious.
I'm certainly not getting the sense of profound appreciation for everything that I did on the few occasions I did them before. Then again, this profound sense came from when I did acid, not mushrooms. Perhaps mushrooms are more of a party/fun drug?
Anyway, I think since coming off antidepressants (although it could just be a coincidence) I've become more and more unhappy, pessimistic and nihilistic and I'm probably just disappointed that doing mushrooms hasn't "cured" me of that.
If there is an "answer" I suspect it's either upping the dosage, spreading out the occasions on which I do it or biting the bullet and getting a therapist.