The idea of a composting toilet honestly freaks me out a bit. The idea of just having a bucket with a toilet seat over it is, frankly, a little gross. The more videos I watch though, the more I'm considering the idea. People, on YouTube anyway, keep saying that as long as you do it right, it won't smell. Fortunately, they haven't invented Smell-O-Vision yet. I really like the idea of not wasting water, of having good compost, and generally not abusing the environment.
There are other forms of the composting toilet, which is nice. There are companies that make the toilets, so they seal, vent and mix the compost for you, so you don't have to think about it as much.
I like this idea a lot because it actually LOOKS like a toilet. I think the bucket idea is just ugly.
Another option is the Incinerating toilet. It looks like there are a couple different brands of this one as well, and I like this one because there is no storage necessary. The composting toilets require bins, but this one burns it up as you use it. Unfortunately, one of the videos I saw said that the ash is not appropriate for use on plants and needs to be disposed of in your household trash. And another video said that they smelled awful! With composting toilets, the video-makers focused on the fact that they don't smell at all, or just like dirt. With the incinerating toilets, they focused more on how cool it was to be able to burn your poo, glossing over the part where you should tell people if it smelled or not. To use this one, you'd have to have some AMAZING ventilation.
The last option would be a more conventional option: an RV or boat toilet. This would be very "Normal", but it would require a black-water holding tank, and require water for flushing. Also, after watching the above video, I really don't like the RV toilet option.
As of right now, a manufactured composting toilet is my top pick. We'll have to see what the other girls think about it.... :)