Someone faving my work is just as nice for me as someone leaving a comment! I am just happy they took the time to look at my work and liking what they see. And you know I always love all your space images!
While writing a comment is something that artists probably appreciate receiving, sometimes I just have nothing better to say than "Oh awesome" or "This is great". In that case, I tend to favorite without commenting because I feel comments like that are really lackluster.
Even though it's a completely different scenario, if you had to comment on a Facebook post in order to "like" it, the whole system would fall apart.
I agree with most of the comments here. I'm one of those people who OFTEN fav something without leaving a comment. Why? Most of the time I like the image, but yeah, nothing particular jumps out at me to say about it. I just like it. I see faving something as a way of saying 'I like it' without actually having to type the words. Sort of equivelant to the facebook 'like' button. If I didn't like it, if it didn't do 'something' for me, I wouldn't want it where I could find it again. It'd be like the masses of art I glance at and pass up.
But, no, faving is saying you like something, and you want to be able to look at it again at a later time.
And yes, I DO leave comments. . .if I have something particular to say. But not everything needs the words. So, yeah, if I was forced to comment I would end up leaving inane things just so I could have the pic. "Nice job." "Nicely done." "Nice pic" . . .I can't see how thats useful at all.
I am no art critic. I can't tell you why something is better than another thing. I can say I like it and favorite it. But really do you want "200" I like it or that's really awesome messages. People who want those are just looking to get their ego stroked.
Lot's of people just know what they like without actually knowing why and may feel they really have nothing to say of any value...whether that be the case or not is another story, but I suspect that's a big reason behind Faves without comments.