Mac or PC?

I honestly prefer a mac over pc, they're more advanced in my opinion but they're faster to adapt to than PCs are.

I just keep replacing PC's with more cheaper PC's but I've always wanted a mac, I'm just worried that their price makes me feel foolish if I found out I couldn't use any of my PC peripherals or the MONITOR with it and I had to buy an apple compatible monitor or external hard drives for macs. Yep, definately worries me that apple doesn't want to use any PC hardware or peripherals and I couldn't upgrade a mac unless I bought everything at the apple store only at exclusive prices or wondered why someone is selling theirs on ebay now....does that mean I'm goin to be buying something obsolete for the newer MAC?