Definitely the like button. I'm on a another dog forum with a like button and always feel good coming on and seeing a got a bunch of likes for something I wrote. I know I'd feel weird writing out a post just to say I agree with someone, unless the post was epic or something, so a like button let's people know you agree and like what they have to say if they don't have other input to add.
I can see how that might be bad on picture threads though, I should post more on picture threads, I look at them all but always feel cookie cutter writing that the dogs are cute/beautiful/whatever even though they are. But I should do it anyways, I know it makes people feel good. Is there anyway to not put a like button in the picture section but have it in the rest?
I don't think a disagree button is a good idea lol. If you disagree you probably have a reason and should state it, otherwise what's the point?
I don't use chat, chats cause me anxiety. And my phone allows texting and phone calls, so I don't even know what the phone one is lol.
I might be more likely to watch embedded videos, I don't know.