I was honestly split between comments on episodes and tags personally, so I'll give what I think about those two.
Comments on episodes would be nice, as we've all seen several times during a storyline where two authors just...hit it off. I've even ran into a few people leaving emails for each other so that they can talk to each other without using the signature line. The negative part of this, is that I'm not always going to go back to specific episodes so that I can carry on a conversation with people. I mean...leave me a comment on my most recent addition, and I'll check it out, but I'm not going to remember to look two or three entries back in a line to see if anyone said anything new a few days (or weeks) ago. Would there be a notifying email for a new comment perhaps?
The other thing is that frankly we wouldn't need this if everyone would just come to the Plume, and come often enough that they could discuss various plotlines and events with the other authors involved (and perhaps some that aren't.). Just something to say, "Hey, I made a special effort two entries ago to keep so-and-so from getting turned into a nymphomaniac animal demon girl...thing, and I was kind of hoping to use her for the storyline for a bit BEFORE transforming her after her character's developed a bit." However, that being said, I don't even remember when the last time I visited the Plume was, and I'm sure no one else remembers either,...or even knows who the hell I am. I'd say we should advertise the Plume on the main page, but...umm...we do. So...what the hell? Maybe if we wrote about the Plume when you added a page? Something like "Congrats on your new post, now go talk about it on the Plume, and get more people interested!" Or maybe if more authors showed up to talk about their storylines or storylines they see developing and like. I dunno...I don't really have an idea for that, I'm just pointing out that *technically* we don't need comments, but they probably would help out for people, like me, who are too lazy/forgetful to check the Plume.
As for tags, I think that'd be a good thing as well, but something to consider is...how would you add it? I mean....we'd have mf and ff for male/female and female/female sex...but what about furry or transgender? fu and tg? Ok, so far so good. But what about multiple character transformations, while having sex in a vr wishmaker, with Jim's parents while they swap genders back and forth multiple times in the middle of the scene? Does a girl with a tentacle growing out of her count as a herm? What about when she's leaking hypnotic/trans formative milk? We'd have to have a mini-addventure just to keep a list of all of the tags. And who's to say what's transgender lesbian sex to one author isn't just lesbian sex to another? I don't know...I voted for the tags, but that's something I thought of.
As for the other things, I dunno. I post on Superstories sometimes as well, and they have the ability to add options. Honestly, I think the "something else" option USUALLY covers this, and sometimes it seems like it encourages people to hijack stories a little more when they didn't get the option they want. I don't like it when an author doesn't give good options, but sometimes I find myself bending a little more in ways I'd never imagined because they didn't give me an option I was hoping for, and I have fun rolling with it. If worse comes to worse, you can always backtrack and use a something else option from an earlier entry, and not enough of the options in a story get used generally anyway.
Favorites might be nice, but most authors don't need I think. We could have a monthly competition or something if you were planning on glorifying someone for their work, or if you wanted to make a special list, we could do more of those lists I see in the addventure index of various story starts and such. Maybe we could add a rating system to that, and open up nominations for story start markers there? I don't really know what I'm talking about.
At any rate, I think I'll stop writing. I've rambled on much more than I thought.
Nack