I got a Mac after using Windows for years.
The real answer to your question is 'It depends'!
It depends on what your files are, if they are 'Word' documents, 'Pages' (Mac's equivalent) can handle them, but you will have to copy and paste them all into
'Pages' if you want a layout similar to the 'Word' layout.
Your pictures/photographs will be fine on a Mac.
Sound recordings? depends how you made them, I used an Adobe studio (Audition) won't work, neither will Cool Edit.
What else won't work? practically everything,
Microsoft Links (best golf game yet invented)
Microsoft Works
Music writing programs such as 'Finale'
Superbike game/Moto GP./Tiger Woods/Scrabble
Photoshop (You can buy it for Mac £500.00)
However, you can run 'Windows' on a Mac, which is something I am about to do as I am tired of having to have two computers, one for the stuff that runs on a Mac and the other for all my Windows programs. so be aware that just about none of your programmes will work when and if you make the initial transfer.
Why do I use a Mac then? because they are built like the proverbial brick
toilet (for want of the original word) Great pieces of engineering and electronic skill (I have a Mac Pro) (Not a Macbook Pro) I get regular, FREE updates of the operating system so that I am always up to date and the system does not have eight variations like for instance Windows XP or Vista
The Mac OS X system, whilst it is not bug free, compared to any windows system that I ever used (apart from maybe Windows 2000 Pro) is rock steady.
Hope this helps with your decision