Ask a Mac user if a Mac is better, and he/she'll almost always say yes. I would suggest you keep asking questions and doing research. Here's my take,
For one thing, Macs are immune to most, if not all, viruses, spyware, and adware, and seem to be more resistant to hackers as well. Mac OS X, being UNIX based, is generally more reliable and crash-resistant than even Windows XP. Things seem to "just work" without messing around. And the interface is generally better thought through than Windows.
As for software, Macs can run many of the same titles as Windows PC's: Microsoft Office, Quicken, QuickBooks, the Adobe and Macromedia graphics/publishing stuff, etc. Also, Apple writes a lot of special software just for the Mac, like iMovie, iDVD, iCal, the Safari web browser, and the Keynote presentation program. Some games take a while to
come over, and a few don't make it at all, though. If you're counting number of titles, there probably is less software for the Mac, but there is usually a program to do whatever you want.
Macs also work with most standard USB and FireWire mice, printers, digital cameras, and other peripherals.
If you do get a Mac, it'll probably take a little while to adjust, just like buying a new car or moving to a new city. I can't stress enough that you should do your homework before you buy to make sure whatever you need is available on the Mac.
Apple has a website (see link)to help find Mac software; if you can't find what you need there, you might try posting here or on another Mac site to see if there is a Mac equivalent. Good luck.