But there are really only a few "major" distributions today. Mint, RedHat, Debian, Ubuntu.
Not true... there are still a lot of great distros out there. It depends what you are looking for. OpenSuse, Lubuntu, Xubuntu, Zenwalk and of course, Slackware are still great options.
... but still isn't ready for Prime Time.
Not true.
I started using Linux when most of the wireless drivers needed to be compiled to work. Everything was manual and you could not get around without using the shell. For me it was great because I learned so much and now I have a job doing that. Nowadays there are many Linux users that use the OS without the need of the shell. Drivers (like wireless and video) work out of the box. Some distros (like Mint) come with pre-installed flash and audio/video decoders. Heck, lately I've been spending more time troubleshooting Windows than Linux.
But in case you do want to try Linux and you are wondering if it's the best OS, the right answer is, you won't know until you try. The same way you can't expect someone to tell you which is the best bike... it all comes down to what you need/want/like.
In my opinion, the main advantages of Linux for the average user are:
- No virus (yes it's true, you no longer will need AV or spyware software)
- Computer will run faster than Windows
- Completely free
You might want to stay away from Linux (or instead you can dual boot with Windows) if you want:
- Games
- Photo editing, as in simliar to Photoshop and Lightroom (I would stay away from Windows and just use Mac)
- Video editing
- Work (some software like VPN and MS Office are harder to get to work)
- You don't want to learn something new