nice to see some oppinions.

I'm sorry for bringing up a dead thread from a few years ago, but I didn't really see a better place for this: What powers do you typically display in a write-up? Or even better, what powers are typically left OUT of a write-up? Is it up to the mod's discretion?

I'm working on writing roles for my first game and want to make sure I somewhat know what I'm doing when the time comes.

It's tricky. All significant events should be displayed in the writeup, but it shouldn't Always be too obvious what is going on. At the very minimum all kills should be present, but it shouldn't be too obvious if a killer was blocked or misdirected to avoid writeup copping. If an action affects many players directly or indirectly, it should also be present.
It's usually more fun with a writeup with a lot of detail, not all of them important, but it's really up to what you feel comfortable Writing.

Generally the only things I put into the write-up are: kill attempts (successful or not) and draggings (EDIT: oh and ghost-writes, duh). I don't believe I've ever had a mass block/MD type of power in my games, but if I did I'd put that in the write-up as well. Same for anything like a cult recruitment or a rez.

As Quebbster says, the toughest thing to do in the write-ups is providing enough detail to tell the story without making it easy to write-up cop people. This is doubly hard for blocked or misdirected kills, since they're going to appear in the write-up but you want to create at least some room for doubt (was that killed blocked, or doctored? etc). The two basic ways I know of for doing this are writing it ambiguously (for example, my Christmas game, where at least from my side it seemed the poem-style write-up helped obfuscate exactly what happened) or throwing in some 'extra' scenes (Magnito tends to do this, or of course Mr Stranger and Hybridity...) Honestly, though, it's a skill that takes time to learn, and there's a good chance you'll stumble along the way. I know I have. But if you just try and keep in mind whether your write-up can be used to argue a point without any possible counter-argument, you should be fine.

Thanks to the both of you for great feedback!

I'm also concerned that I might make one faction more powerful than the other, but that's probably something that will just come with time/finding out the hard way.

You will learn a lot of things the hard way. My first game, I forgot to tell someone that they were silenced. We all screw up though, so don't sweat it too much.

I'll echo what the others said as well. Kills, drags, failed kills, cult recruitments, and ghostwrites are all going to be in the write-up. After that, it's your discretion and being vague is a big key no matter what. "A man and a woman had a brief encounter". Could be any number of things. The big takeaway there is one female and one male.