For me Characters which stand out for me would be past and present...
EE- Stacey, Pat, Dot, Jean, Kat, Peggy, Phil, Tanya, Bianca & Whitney

CS- Tracy, Becky, Liz, Gail, Carla, Frank, Kylie, David, Steve & Peter
Stacey Slater for me was just amazing throughout her time on EastEnders.. Bipolar Storyline stood out for miles, same goes to Jean, can't be easy to play her character either.
Whitney's abusive storylines were amazing
Peters alcahol problem was handled brilliantly, amazing storyline aswell as EE Phil Mitchells cocaine and alcahol problems
Frank and Carla storyline is amazing, and so was Carla and tony's ect..
^^
But them characters for me are just amazing