i use both without issue
i sit behind a PC at work with a horrible little screen
i use a windows laptop at home which has been really good over the last 4 years. only just got it back from having a new HD
plus now my main home computer is an oldschool (late 2005) Powermac G5
the last of the true macs (powerPC)
i love using my mac because its certainly fast enough with 8gb of RAM (half what i could put in there) & the 23inch cinema display is a joy to look at
macs have been intel based since 2006 anyway so they are not so far removed from their microsoft cousins anyhow
in my experience they both work pretty much as well as each other but the macs just look so good. if it didn't work as well as it looked you would almost think them guilty of form over function
in fact my G5 looks awesome with the side cover off with the big cowling over the CPU cores having a shiny chrome G5 logo
they didn't need to make it look so good inside but they did
its the little things that set macs apart like the pressure it takes to move a screen. eg my cinema display can be moved with almost no effort yet it satay where you set it. also try opening a macbook. push the release, lift the lid, the lid opens fluidly & the keyboard stays sat on the desk. one handed, nice & smooth. try the same with most laptops, flick the release & lift the whole thing up! use your other hand to hold the base down etc
its little touches like that, things you take for granted that all add up to make ownership nicer. its a fully designed product rather than just a utilitarian box
simple answer is they both work for their intended purpose but you may have to pay a bit more money if you want it to work slightly differently & to look nice
maintenance for either isn't a problem for me as i got a buddy who fixes PC's & the mrs is a certified mac technician/engineer