There are only 3 kinda people in your Facebook friend list
1) People who likes your update but never 'LIKE' it because they don't like you.
2) People who always 'LIKE' your updates (without even understanding it) just because they like you pretty much.Finally
3) People who likes both your updates and yourself but never hit a 'LIKE' just because they don't LIKE 'you' going popular with their friend list.
P:S- A specific breed is there who never 'sign' in to FB and who always stay offline in chat, updates can be seen once in a blue moon and they say they created FB profile for socializing.