Why don't I get "likes" in facebook?

[Vasilis K.]

Today, I post to my wall "Merry Christmas to everyone" and I get 2 likes. I see every other "Marry Christmas" post and they have 20-40 likes. When I upload a song I get no more than 3 likes, but usually I get 0 likes. My profile photos get about 10-15 likes and I'm definately above average in beauty.
Also, recently I like many many posts so I get some "likes" in exchange, but I get nothing... What is going on? Do I suck as a personality? I mean, it's Christmas, is it so hard to be polite and press the like button at least on a "Merry Christmas" post? This feels so lonely...
I know I shouldn't care about things like these, but who doesn't?
I have 330 friends
@SmartyPups: I looked every single post of the last 2 days, and the 2nd lowest Merry-Christmas-post was 8 likes. There was another one below 20 likes, but every single other post had more then 20 likes