I got hooked on TWD when AMC did their mid-season recap of season 5; it became pretty clear that I had-to get the story from the start. Netflix to the rescue. 
Favorite characters from season 1-3(so far) and most of season 5:
Rick- he's been the designated leader from the start, huge job, I think the writers will keep him unless they see the need to 'shake up' the character mix.
Michonne- saw her first in season 5 recap, just showed up in beginning of season 3. She's been an enigma, showing signs of opening up in post mid season 5.
Daryl- actually just seemed like run-of-the-mill redneck, but really shows heart, especially after search for Carol's daughter Sophia.
Dale(deceased)- a real decent guy, he passed wisdom to many group members. He imparted his keen sense of morality, also taught Glenn valuable skills.
Hershel(deceased)- enormous asset in so many ways,the group all really owes their lives to him. A tragic loss.
***I'll finish this later, have to go do Real Life things***

Favorite characters from season 1-3(so far) and most of season 5:
Rick- he's been the designated leader from the start, huge job, I think the writers will keep him unless they see the need to 'shake up' the character mix.
Michonne- saw her first in season 5 recap, just showed up in beginning of season 3. She's been an enigma, showing signs of opening up in post mid season 5.
Daryl- actually just seemed like run-of-the-mill redneck, but really shows heart, especially after search for Carol's daughter Sophia.
Dale(deceased)- a real decent guy, he passed wisdom to many group members. He imparted his keen sense of morality, also taught Glenn valuable skills.
Hershel(deceased)- enormous asset in so many ways,the group all really owes their lives to him. A tragic loss.
***I'll finish this later, have to go do Real Life things***