prior to owning macs, i grew up on custom built computers. at that time, no vendors were really offering anything that aligned with my interests in digital video and 3d. i remember going into a big box store and asking what hardware they had for manipulating video on a computer; they looked at me like i was from another planet - or the future, as it turns out
so instead i cobbled my own systems together with help from a local shop that offered specialty equipment; does anyone else remember the original ati "all in wonder" or the "matrox marvel g400-tv"?
when i finally came to macs in the early 2000s, it was like an amazing realization that there was actually someone making systems optimized for exactly the type of creative tasks i was doing.
since then, apple has swung back into the mainstream, and while the creativity aspect is still firmly in its dna, you can definitely see that their focus has shifted more towards shaping tools and experiences for a broader market.
that said, the majority of what i see from competitors continues to be chunky and/or flimsy plastic bevels with washed out screens and covered in stickers. (i'm sure there are exceptions, but thats still the prevading aesthetic, or lack thereof).
i was trying to help my parents find a laptop a year or so back, and while their computer needs are pretty modest, the laptops just looked so gross i honestly couldn't find anything that looked decent. i ended up giving them my old macbook pro, and my mom became so enamoured, they went out and bought an imac to supplement it (although oddly, the older macbook pro still seems to be the main thing they use).
so yeah, i guess if macs didn't exist, i'm not sure what i'd do. i probably wouldn't be so spoiled by build quality and aestethics and would have found something to make due. razor makes something that looks almost identical to a macbook pro in black, but i have one of their mice, and its been nothing but trouble on the driver front.