I'm not going to share a specific dream, but I can tell you what they're like: I shape-shift a lot in my dreams. I mean, a lot, and it's almost always completely involuntary. I've been various superheroes, anime characters, random actors, escaped mental patients, both genders, cyborgs, monsters, random animals, even objects. I've changed my age, my size, my clothes have shifted mid-action ... no idea why, it just seems to be an on-going theme.
A lot of my dreams also either start out as or end as nightmares, usually involving the death of someone I care about, scenarios in which I'm about to die, or some kind of body horror / implied body horror. On rare occasion, they're just about negative emotion, like rejection, embarrassment, exc. If I have powers in a dream, about 90% of the time they don't work properly or just stop working shortly after I obtain them, which is frustrating as hell.
The other 10% is usually brief. The dream either cuts off just as I'm starting to have fun or the dream itself just changes into something else, which is also ridiculously frustrating. I also tend to move slower in dreams. If I'm running away from something, for example, and I can't think of a better solution while I'm running, then I don't have a prayer. I will get caught.
Aside from horror dreams, the other ones are usually sad in some way, or bizarre. If they're neither of those ... I have a much harder time remembering them. I've had a few truly good dreams, from start to finish, but not many. The good dreams tend to be family related, but a couple have just been me screwing with reality to make up fun scenarios. I love lucid dreams if I can change the dream--but my subconscious doesn't always let me.
TL;DR? My subconscious is an asshole to me on a regular basis.