No, I don't think so.
That could be the case, about people leaning more to the sweet and shy pegasus. It is also understandable that it has something to do with their own qualities. Kind of like how you choose friends. "Tell me who you're friends are and I'll tell you who you are", as how the saying goes.
But I believe that it does not only tell you who you are but more specifically the qualities that you deem important. Other than that, they could have qualities that you would love to have or those in which you can relate more.
Like if you ask someone to give a word which describes them the most, they could say that they're 'shy' or 'hard working'. The former would sound a bit unappealing contradicting to what the latter said. But a warning for this fickle kind of idea is that people are more than 'shy', 'hard working' and any other adjective. I've met plenty of 'shy' people having more friends and 'hard working' ones that are not easy to approach to.
I like Rarity. Why? Out of the six main cast, she's the more creative one. I'm creative so it makes sense (not to brag here every pony).
Also, she has a certain kind of confidence that I admire. Her ability to be head-strong when it come to her dreams and aspirations is really awe-inspiring. (Miss Rarity, if you're reading this then congratulations to the new boutique in Canterlot. You deserve it ). I can understand how she is such a "Drama Queen", knowing she doesn't give two bits about every pony out there when her mascara is running on her face.
I could say how much a sucker I am for her colors, white and purple (?) are really elegant-looking.
If my friends would have to pick from the six on which one is more like me, I'd say I'm a Fluttershy. Not relatable on the actual one that I like but I don't hate her either. But ask me the same question then I'm Team Rarity all the way.
-WM