I thought I'd reiterate what others have said -- the importance of trying a particular fruit / cultivar more than once before passing judgement.
A few days ago I tried lemon meringue for the first time at a fruit stand and it was very bland. Yesterday I tried it at another fruit stand and it was delicious: sweet and rich, a touch of lemon, no off flavors. I bought a few and they have been excellent too. (I'm not saying the nursery was the difference, just different day, different fruit, different ripeness, who knows?)
And, now that I've had 8 or 9 Pickerings, different sources, different days, I finally understand why others enjoy it.
I've now had a Mallika that tasted rich and sweet, like candied carrots, and one that was good and did not taste like cooked carrots.
Even my own mature Dot tree gave me fruit ranging from musky/musty sweet to good to eyes rolling back in my head, "now that's what I'm talking about."