Harry Potter remains lively.
Star Wars will see a brief resurgence with the release of the latest movie.
Naruto is waning, which may be a blessing considering some of what's been posted there (Kushina's a slut, Naruto's a cuckold, and some idiot called lala wants everyone writing for Naruto to kill themselves unless they write the One Twu Pairing, which is apparently Sasuke x Sakura).
Vampires, were-creatures, and shifters are always popular, especially if the vampires, weres, and shifters are all sleeping with each other against clan law/tradition/decree (otherwise known as the Romeo and Juliet/Julian trope).
F/F is gaining popularity, while M/M is a perennial favorite.
Your mileage may vary, but that's what I see on a weekly basis while sweeping the archive.