I tend to stick towards the artist I like until he/she starts to become a bit too slutty. Or releases songs that doesn't fit their genre of music and is just downright awful.
hmm at the moment i like Sammi Cheng, Joey Yung and Janice Wei. Hmm.. dont have a favorite korean singer at the moment.
i have been a eason fan for 5 years i think if more 6... i do like other singers (ken hirai!) aswell but no one can beat eason haha!!^^