According to the help section, I should choose the 64 bit version of Ubuntu unless I have a reason not to, but according to the download page, the 32 bit version is recommended. Assuming I have a 64-bit processor and less than 4 gigabytes of RAM, which of these should I choose? I know RAM isn't the only memory that counts toward the 4 gigabyte limit, but I don't know how to tell how much other addressable memory is installed. I only have 2.8 gibibytes of RAM, so I'm not sure if it matters anyway.
In addition, 12.04.1 will be supported a while after 12.10 looses support, but 12.10 is more recent. Is it better to use the longer supported version, or is it better to use the version with newer features? Do I even need support? Do I even need newer features? I'm the only one using the computer in question, so whether I upgrade to each new version or only upgrade to long-term supported versions, it won't disrupt other users.
Basically, I was a Mac user, and I can't use a Mac anymore, at least for the time being. It's a bit of a long story. I refuse to downgrade to Windows, so I when Linux instead. Although, I actually like both Ubuntu and Mint better than OS X now that I've tried them, so I don't think I'll be switching back. Anyway, I don't have any major usage requirements, just some functionality that all major operating systems have, such as a modern browser, Java, Python, Apache (for personal use, not public), and some other things that are available with all four (two times two, not two plus two) current versions of Ubuntu. A few games such as SuperTux2, Mystery of Solaris, and Minetest (again, available to all four) wouldn't be bad either. How do I know which version to choose?
My other computer is a Frankenbuild, with a 32-bit processor. So, 64-bit Ubuntu is not an option. However, that computer has four users. It's mainly used by my younger siblings. Does that make a difference in deciding whether to stick with long-term supported versions or using the latest stable version?
Thanks for the advice!