I wish a hammerhead, or really any classic alien, would have made an appearance in TFA. Chewie, along with cameos by Ackbar and Nein Nunb, are the only classic Star Wars aliens in the film.
Yeah that was one of the things that bummed me out regarding the aliens. 1. We didn't see a weequay, rodian, or any other familiar alien just in the background here or there to really feel like this was the same universe (would have been so easy to do at Maz's bar or maybe even in Jakku) and then 2. Many of the new creatures they did create, some of which looked stellar like those in the Vanity Fair photos, didn't make the final cut.
Being that it led from ROTJ, the movie felt very human-centric. A bit more than I expected. Maz didn't do much for me. The one standout creature for me was the scavenger who netted BB-8 and the awesome looking beast he was riding on--wish they'd done more with that scene.
Finally seeing the movie for a second time tomorrow. Can't wait.