I'll give Misty some credit in that I think she had a lot of character potential, however, I think I missed Brock more when Tracey replaced him for that short period of time. During Johto, Misty really seemed to exist to be Togepi's caretaker, and the puller of Brock's ear. Misty may have had more personality than May, but I ended up liking both her and Max better in the long run. I guess I'd have to say I didn't really miss Misty at all. If anything, I only missed Misty's Horsea. And Psyduck sometimes, why not?
I haven't seen anyone after May/Max, but I heard good things about the others. And some bad. I can't remember which side of the fence Dawn was on back during those years, but I recall some complaining.