I use both daily.
The mac is more fun to use, no idea why but it just feels more interesting when I'm using it, lots of hidden little bits to make life easier. Like the Finder, it just works well and time machine is sat their ticking away keeping your files safe every hour.
The windows machine is like a rough, fast and occasional grumpy tool that gets the job done but when it has a brain fart it can hold your days work to ransom.
Keep using the Mac, follow some guides on Mavericks to discover all those little tricks to make your life easier and it becomes a pleasure to use.
The only thing I find difficult when switching between them is the Apple keyboard has spread out keys and the windows keyboard doesn't so its like typing for the first time until I get used to it again, about 20 mins of typing.