Things a like can mean

Things I've meant by clicking 'like' on Twitter:
Wow that was really funny, you made me laugh on a grey day
Yes, I have seen your response but I don't know what to say in reply
I choose not to be the only one in your social circle who hasn't 'liked' this
I wholeheartedly endorse this sentiment
Mildly amusing
I enjoyed the story/article/video you linked to
Thank you for linking to that story/article/video, I may look at it someday
Clever wordplay, well done
What a lovely cat
Fabulous photography
Good for you for sticking up for yourself/this cause
Option B in the retweet/like limited poll
Wish I'd said that
I said that yesterday
More people should say things like this
I defend your right to say this but I disagree
I would like to end this conversation now
I accidentally leant on my trackpad and don't want to unlike this in case that makes you feel bad