Because you can be proud of your own work!
On most social platforms, it is possible to do so as well (twitter, etc.)

Uuh, then I should quickly go and like all my own models! 😛

Ah no, it's enough to view them in full-screen mode. The quality is so amazing, that I'm almost becoming too lazy to render...

Because 1 like is better than 0 likes.. 😄

I just thought it was one of those things that you don't do because you shouldn't, and leave it up to what other people think. But I might do the occasional one now that I know... 😛

Ya. I'm a pretty humble person, but on internet I'm so selfish. Usually like my own comments (unless it shows who liked it) but recently I've been retiring from self liking even if nobody else knows. 😛