I prefer commentary over Likes on a photo or a page. But then again, I look at other cosplayers and just feel inadequate. I want to improve my game, but I'd rather make most of my props and outfits, and I barely have time to make them. All I do is accrue materials and design concepts, but rarely finish the way I want them due to time constraints.
I have maybe a hundred or two hundred likes on my facebook page, but I don't think that means anything. I'm happy so many people like my work (even if it's not much compared to other cosplay pages) but I would be as much as if they were only 10. And it have it's advantages, this way you can talk with everyone and reply to them easily.
People liking your page doesn't mean you own them or rule them. They just "like" your work and/or your posts, that's all
I feel like I can't answer this yet because my cosplay is still in the making. I honestly don't care about likes. I'm gonna be making an awesome cosplay just for the sake of having fun and meeting new friends with similar interests, as well as joining a club for the specific type of cosplay I'll be doing. I'll most definitely post pictures to facebook, but that's simply because I want my friends and family in other parts of the country to know that I am doing what I want to and I am enjoying it.
I don't have a facebook anymore... mostly due to the fact that I don't want "everyone" to be able to get a hold of me. But in the time that I did, posting my work was a way to show... well anyone what I had done. Like a cat that just caught a mouse and want to show his/her owner(for a lack of a better word). Yet unlike the cat I do it just for me, I will not work on a theme or peace of work more just because it had more likes and upbeat comments. I do it for me... I can see the appeal of doing work that the "community" flocks to. Now... if it pays the bills.... well maybe. XD