Tim drake was best developed as robin and he was created only weeks after i was born so he is a kindred spirit to me. i also love Dick but find that his character wasn't really developed until he became nightwing. Jason was okay and I wish he appeared in more non-canon graphic novels as robin that don't focus on his death. As for the other three robins, i don't like them or care for them and as far as I am concerned never were needed to be created in the first place, especially Damian (my least favorite "hero" of all time).
This isn't a favorite Robin poll. It's framed more as a favorite character to have held the Robin mantle. For example: Dick as Nightwing is a totally different character than him as Robin. Dick's on his own now. More experienced, etc.
Anyway, I'll go with Dick regardless.
And I love Nightwing!