Mine was an eMac which I got in 2005.
Up until then I had only used Windows computers so OS X was a completely new experience. My initial reaction was quite negative, I hated the menu bar at the top of the screen, and I found that a lot of my software didn't have an OS X version. I also hated the one click mouse and lack of delete key, and I could never tell which applications on the dock were actually open or closed. Over time I adjusted and found myself appreciating the stability of OS X. I also preferred the the Mac software because it was always simpler and easier to use than what I was using on Windows. In the end it was a decent machine and it ultimately encouraged me to buy more Apple products.