I bought my first Mac SE 20 in the 80s. I've been hooked on Macs ever since and luckily they've built them in such a way that allows us to easily install add-ons like hard drives, ram, misc. cards, cpu upgrades, etc.
The only serious problem I've ever had was when Apple didn't include the correct system disks with my 867 Quicksilver. It was murder trying to troubleshoot that.
Oh yeah, I forgot my 867 cd/dvd burner broke after about 3-4 years. That was a bitch too.