Smiles
Fragment of a discussion from Talk:WikiLove
Then a new category of WikiLove messages should be created, as it does not fit in Barnstars, not in Food and even people who did not pay attention to biology lessons, would see that w:Template:Smile is not a kitten. It's IMO a good idea to put a new category "others" in, in which admins can add new messages.
I have another suggestion: why not add the birthday templates listed at w:en:Wikipedia:Birthday Committee? The calendar there shows that every day lists at least a couple users who have shared their birthdays or anniversaries. I'm sure wishing others a happy birthday is a great example of WikiLove.