Well, I find it a bit odd that when I hit "Like" that is indicated by a heart...which seems a bit more serious than a mere like...and makes me feel a bit creepy and stalkerish as well...not to mention the thought of sending hearts out to other guys is a bit disturbing to me...
I don't think I will use it again unless the post is clearly made by a moderately good looking chick, I suppose...
I remember the old days of Stangnet when we had to "quote" someone, and then add a thumbs up icon to "like" something... and that was on an actual computer in our house! (In my best old man voice)