I find them adorable almost all the time to be honest. I get super excited when I find one of them asleep standing or sleeping while sitting. I also adore the goodbyes they give when you leave their home or the sway laineybop mentioned- it's so totally cute! I also really find it cute when they ping you and come running to you just to hand you gift or to say to take a break (when I'm doing my never turn off my 3DS marathons, I get more than one of my villager telling me to take it easy haha). There's also the thought bubbles when they're "deep in thought" about something and they do it for ages lol. I followed Felicity for just about five minutes all over town and all she was doing was "deep thinking" - and yes, I had that much free time to just follow one villager around for that long just to watch her think lol.