I love Mary Jane Watson <3. I still like Felicia well enough, but I haven't really been able to get back into her character since she rejected Peter Parker and could only care about Spiderman (whereas MJ loves him for who he is, all aspects of his life).
Yep. MJ and Felicia did eventually manage to get along, with Felicia accepting the fact that Peter and MJ were married. Though... that's no longer the case in the current Spidey comics (although I really wish either MJ or Felicia would give Carlie Cooper a sock across the jaw... what a useless unneeded waste of paper).