Oddly specific maybe and I don't think you'd expect it from me, but environments? I love describing the weather or old rooms or sparkly new rooms, so much fun. Like, if I write about a cafe I want the reader to almost be able to smell the coffee. My vocabulary isn't spectacular though, so being very descriptive can be a challenge.
Close second are very soft romantic or melancholic moments and boy howdy do I use those a lot in my current story.