In several wikia websites users are able to express their opinions about characters, episodes or shows, usually by leaving comments right underneath them. Is there any way we could ever do the same here?
As SFH is no longer active here, I'll answer this.
No. Enabling comments would take away the talk page.
As for opinions, that's what the forums are for. In my experience, comments just elicit a load of pointless yells from random people. I've seen "First!" and the like. It adds nothing. A talk page, on the other hand, is meant to discuss the actual content of the page and any changes to it.
Once I made a little comment about the Justice League Unlimited series....I think in the forum once, but I was told by someone that we should only discuss stuff about this website, or something like that.