In reality the application for wide gamut colour spaces are very limited.
- If you have a normal monitor then you're viewing sRGB colours anyway.
- Everyone on the internet is viewing sRGB colours anyway.
- Most cheap print labs work in sRGB colours anyway.
- Lots of nature is in sRGB anyway, and by that I mean unless you're shooting wonderful sunsets, neon lights in vegas, LEDs, Lasers, or with a polariser and saturation boosted up you won't get a difference on many of your shots.
- Some more expensive print labs can't print better than sRGB anyway depending on the paper.
- A decent lab with a proper chemical process can and will get the extra data out of it. But it'll be too expensive to do for the hobbyist anyway. Ok that's a lie, we can afterall afford our cameras.

But realistically out of the 60000 images I have taken, only 3 have been given this treatment since the lab charged me $40 and the framer $100.
From a technical standpoint however there's lots of good things about AdobeRGB. It captures a wider range of colours. Green is greener, blue is bluer, etc. The downside to this is that it's actually BAD to do this when you shoot in JPEG since the 8bit per pixel limit of the JPEG standard doesn't give you enough dynamic range to record every possible colour in the AdobeRGB space.
So to that end there are only two settings in your camera that make any kind of sense at all. sRGB, or shoot in RAW where it doesn't matter since your software on the computer will ultimately decide what colour space to work in.