This is going on how well written they are, not if I actually like them or not.
Harry Potter
Best
1. Harry Potter
2. Severus Snape
3. Hermione Granger

Worst
1. Vernon Dursley
I honestly don't think there are any other characters in Harry Potter that I dislike.

Twilight
Best
1. Rosalie Hale
2. Leah Clearwater
3. Seth Clearwater

Worst
1. Bella Swan
2. Edward Cullen
3. Renesmee Cullen

Harry Potter

Best:
Neville Longbottom
Luna Lovegood
Severus Snape

Worst:
Cho Chang
Zacharias Smith
Grawp (The guy just had a pointless character arc).

Twilight

Best:
Charlie Swann (I think. Can't remember if Bella has his name or her mum's)
Jacob Black
Jessica something. I dunno, she was played by Anna Kendrick, who's awesome.

Worst:
Bella Swann
Edward Cullen
Emmet Cullen (is that his last name? Can never remember)

Harry Potter


Best:
Hermione Granger
Fred Weasley
George Weasley

Worst:
Voldemort
Bellatrix Lestrange
Draco Malfoy



Twilight



Best:
Mike Newton
Tyler Crowley
Eric Yorkie


Worst:
Edward Cullen
Bella Swan
Jacob Black