This is an interesting question, because it's one that's really difficult for me to answer. If it's my best feature, I can easily default to the one that I get the most compliments for on SG: my eyes.
My best quality, though? Yeah, definitely a tough one.
I guess if I were to pinpoint a quality about myself that I enjoy the most, it would be my sense of wonder every time I see a cute dog or cat. I don't think I'll ever get over how much I love seeing other peoples' pets. I could probably never get my licence because I always get too distracted when I see dogs on their daily walk. Plus, when I'm in SG live streams, I pretty much always comment on the model's pet if it's on the screen.
Anyway, I think I'm going to leave it at that... and probably go and pat my dog.