I hardly ever dream, or at least I can't remember having dreamt. Some people have very lucid dreams often involving themselves and their interactions with people they're familiar with or even with strangers. Some people can even remember what was said in the dream. My dreams when I do remember them are always pointless and they never involve any talking, usually only observation and I don't know where they're supposed to be set, and the background seems blurred and colourless. If I do remember the dream it'll take less than a minute to forget all about it.
I've been taking SSRI anti-depressants (sertraline) for 9 years, I've read that they can reduce the amount of REM sleep you have each night. I'm only 26 years old and I think I should still be dreaming lucidly. However, I'm not sure if the brain injury affected my ability to dream because I was 14 and recall dreaming throughout my teens.