Count me in as a person who likes Neelix. I felt that he actually started growing as a character once Kes broke up with him. I think their relationship brought out the worst in him in that he was possessive, jealous and some what controlling. I think Neelix had massive abandonment issues stemming from losing his entire family and this came out in shitty ways in his relationship with Kes.
Sure Neelix could be annoying with his overt cheerfulness but i think behind all that was a guy who doubted his worth and was broken emotionally. I'm glad that was explored during the annual serious neelix episodes.