I don't really care for the character, but I agree her best period was in the 70's, with the Perez Avengers. For me it was Avengers 200 that ruined her. She's not the only character out there who has been the victim of bad writing, but she is the only one with this icky combo of rape and incest forming a major chapter in her life. It's funny that it was Claremont - Carol's strongest champion - that removed her from the board with Rogue's introduction. That's how damaged she had become.
Pym Particle also has a strong point that her personality has been pretty different, depending on who writes her and what editorial wants for the character. Since before becoming Captain Marvel, editorial has wanted to make her the #1 female character at Marvel, and I just don't think she deserves it.
I'll say one thing, though - her black Ms. Marvel costume is one of the most iconic female costumes of all time.
There's really no appreciable difference in her personality from writer to writer, at least no more than all characters can say about all writers. Tony's been through it. Thor. Steve. Banner. Ad infinitum.