My big stack of cartridge razor blades has just run out and I'd like to replace it with something less wastefull, and from what I hear a safety razor gives a better shave too.
From what I can see there's no big difference beyond personal preferance on ergonomics, but are there any brands to avoid? Any well regarded? Can I just get anything? Anything I might not have thought about?
I've been using a Merkur Progress for ten years now. The adjustability of the action makes it more versatile, which makes it easier to adjust to different types of blades. I use Astra Superior blades, but also have a stack of Shark blades that I at some point liked, and some Feather blades that are insanely sharp and unforgiving.
Make sure you learn how to lather properly. A good lather makes all the difference, and it also a major factor in making it a lot more enjoyable than the canned Gillette-stuff. I use Proraso for my run-of-the-mill shaves, and have over the years bought a variety of hard soaps as well. My favorite is Marlborough from D.R. Harris.
EDIT: I had one of those starter razors from Mühle in the beginning (Rytmo?). It snapped in two at the neck after I dropped it by accident, after 6 months use. I still have the synthetic hair brush that came with it. Some people go really into brushes, but I've been happy with mine.