I'm not surprised that the strawberry and raspberry taste similar, and are heavier on aroma than on flavored taste. I also am not a big "chocolate in my tea" fan. I may not be much help because I don't drink many flavored teas anymore, but that's what brought me to loose tea in the first place. I do enjoy the chai blends, especially the Thai Chai which has a distinctly different flavor than standard masala chai blends.
I doubt you're doing anything "wrong" although you may need to bump up the leaf amount and the brew time to extract more flavor. What each person likes varies so much, its hard to recommend other flavors. But my own experience is that I came to Adagio enjoying very highly flavored teas. But I have progressed to drinking mostly unflavored teas, and when I want a flavored tea, I want the taste of the tea leaf to shine through and not be overpowered by artificial flavors. To me, many of the teas I used to enjoy now taste very artificial, soapy, perfumy, blech. I much prefer Adagio's flavored teas to most others because I don't get that unpleasant artificial aftertaste, and I can actually taste the tea leaf flavor.
Its a journey.
Glad to have you with TeaChat.