Most annoying characters (in order):
1. Hyosim's mother - a leech and totally annoying
2. The bar flunker brother - ingrate
3. The landlady - obnoxious
4. Taemin's father - so weak
5. Taemin - pretentious

Likable characters:
1. Hyosim - tries her best
2. Taeho - seems cool
3. Taeho's grandmother - strong woman
4. Sugyeong - classy and decisive
5. Hyosim's eldest brother - practical and hard worker

Nam Bora's character gets special mention for chasing her dream diligently without relying on anyone.

We'll see how the characters turn out in the end.