I bought my first gaming-capable PC in 2000, along with Caesar 2 (Plebs are needed!), Civilization 2, and Warlords 3. From such humble beginnings were great things made, as a deep, abiding love of simulation and strategy games, born in the days of SimCity on the SNES (for my money still the best version of SimCity Classic) and steeped in Koei strategy games (everything from Romance of the Three Kingdoms to Aerobiz and all points in between), finally found itself in full flower.
Europa Universalis 2 came out in 2001. Tropico, same time. Found Alpha Centauri in a bargain bin (it was two years old by the time I played it) and had my mind blown. Patrician 2 came around a bit later---my girlfriend at the time and I would play it together on a crude LAN (and boy, were LANs ever squirrelly in 2002!), me on the desktop, her on her laptop, dividing the Hanseatic League along a straight line through Denmark in a divide-and-rule strategy.
Discovered Medieval: Total War in early 2004, the perfect time to fall in love with that series considering what came out later that year, only the greatest game of all-time and a PC exclusive.
Morrowind and Oblivion with mods. Fallout 3 with a fan patch that fixed the scripting errors. Empire and Napoleon and New Vegas with graphical fidelity that consoles just don't have the punch to deliver but my $1200 you-get-what-you-pay-for fall-2010-issue computer renders with barely a dropped frame in sight.
Is PC gaming worth it? I write a check for $100 to Dell Financial Services every month and will do so for most of the rest of this year to pay off the aforementioned PC with no interest (yes, I could've built my own. Priced the parts on Newegg, came to about $950. The extra money's worth it for one-stop warranty service and the generous credit terms). And not once do I think "what a waste of money" or "I should've spent a third of this for just a computer to do homework on".
I mainly think "Worth every penny, and it'll last me another four years at least, just like the last one did."