Welcome!
I think you meant to say "Windows" there where you said "normal." A lot of us find the term offensive, as it implies we are abnormal. It's a lot like referring to white people as "normal" and other races by their usual names.
While Macs don't dominate the computer marketplace the way Windows does, Apple is still the fourth-largest computer maker in the world, has one of the highest single-brand marketshares, and because of its high dominance in the areas of smartphones, tablets and music players, is the second-largest company by revenue in the US. It's market cap is higher than most of the rest of the big players -- including Microsoft, which is seen as being in decline -- combined.
As for why you should switch, there are MANY MANY threads on this topic here. Read most of the other threads in this sub-forum (switcher's hangout) and watch how fast you come across one of the (literally) thousands of "why didn't I do this years ago?!" and "I'll never go back" type posts you'll find here.
The main reason most of us switched is because the Mac OS is superior to Windows in many ways. It is more advanced, more stable, more secure, and gets out of your way (once you have gotten comfortable with it) and lets you do your work better. Apple as a company seems to be genuinely interested in creating delight in their customers, creating opportunities for more and better quality work, and focuses on pleasing aesthetic values that provide many less-tangible benefits. Some types of people really value that. Some do not.
To put this another way: if you can look at a Frank Lloyd Wright house or a Van Gogh painting, and your thoughts are "just another house" or "just another painting," then a Mac is probably not for you.
I'd really encourage you to visit your local Apple Store or independent Mac dealer and explore for yourself. A text message on a forum trying to convince you to switch is like someone telling an alcoholic to "just stop drinking." Maybe that will help, but the true motivation to change has to come from within.