I used to be a Windows user. I'm pretty sure I'll have to revert back on rare occasions when using school computers at the library, however the major computing center and the language learning laboratory have dual-boot mac and windows systems now. In fact, before I made the switch with my laptop, I really got myself familiar with Snow Leopard, since that was what was loaded on the school computers. I deemed antivirus on my Dell useless because I was so careful with my browsing. I had Firefox and Chrome on my computer, disabled Internet Explorer (I hated it so much!) and had No-Script/ScriptNo respectively, effectively blocking EVERY flash based and script based process unless I manually let it through, as well as AdBlockPlus to block potential adware threats, and WebOfTrust to alert me when I was going to a potentially unsafe website. On top of that, Firefox, which I used most often (Chrome was the backup) would warn me when the website I would visit was deemed "unsafe". I would also be extremely careful about my downloads,and only downloaded files from trusted websites. I later obtained McAfee trial through a download from Adobe Flash (didn't intentionally consent, accidentally clicked Next in the installer) and figured meh what the heck I'm not going to uninstall it. It told me I had no viruses. I believed it because the computer ran fine. It was physically breaking on me, (Dead power cord, broken hinge) nothing to do with the OS environment. The only slowdown I had was due to running multiple programs, and firefox was a RAM hog... >.> so I switched to Chrome full time. I'm happy with chrome. And now I feel much more comfortable using it on my Macbook Pro over Safari. Safari works well on my iPod touch though
I'm so attached to OS Lion. Touchpad gestures... omg <3 So easy to scroll/surf/click, access widgets, and go back and forth between webpages since I spend most of my time either watching videos or going on the web. I also felt like having the dock on the bottom of my screen shortened it a bit too much, so I relocated it to the left side of my screen and it's great. Out of the way and my webpages are the perfect size. Everything is so intuitive and Finder is so easy to use. Mac couldn't feel more natural to me, and it's a bit TOO easy!
Granted, my first experience was a Macintosh Classic when I was extremely young, about 15-16 years ago. I'm 2 weeks short of my 21st birthday. I also spent the summer of 2003 on an iMac G3 in a Web design course based around Dreamweaver and Flash. I also used the newer OSX as mentioned on the school computers. I have also owned a myriad of iPods, ranging from the Mini, classic, and Touch. My parents have Shuffles and Nanos that I've been required to update for them, my mom an iPad, Dad has an iPhone now, and Dad's buying a new iPad for himself tomorrow. We're quickly becoming an Apple family. Windows is just so inefficient, and Mac does do the job better for me. Loving every minute of this new Macbook Pro. I have not had a single problem, a week in, knock on wood.