The silent scenes in the first act do a beautiful job of helping to define Rey, and Ridley's quietness with Ford carries that forward. She is not much of a talker outside of her scenes with Finn and later Ren, and I like her all the more for it.
If folks want to take all that and shove it aside and claim she has all the nuance of a BioWare MC who will stare awkwardly and borderline creepily off into the aether if the player doesn't input immediate dialogue, well, they're welcome to do so. If they genuinely don't perceive Rey as I do, hey, different strokes. But it is a little bit crazy to me how dull and uninspired and "Mary Sue-ish" some of the claims are.
You know who I dislike? ANH Luke. ROTJ Luke is probably still my favorite character in the franchise, but ANH Luke's shrill line delivery and constant need to be yapping away cheesily doesn't really work for me. Rey's first chapter has me hooked. I have a much stronger emotional bond with her character than I ever would have had with Luke judging by his first episode only, I think. I've sort of been in her (beginning of the movie) shoes a little bit and I reacted similarly. I think she's believably portrayed and Ridley ensures she has a reasonably full spectrum of emotions.
I can't wait to see where she goes.