When I started university in 2005 I got my first laptop, a Compaq V2000 with a 1.8 GHz Sempron, 512 MB of DDR 400 RAM (later upgraded thanks to a friend to a whole 768 MB), and a 60 GB HDD in addition to some weak ATI integrated graphics. It couldn't run much, I was happy it could handle games like Half-Life and its universe though I never ended up doing much gaming with it.
I used this laptop for most of my university years mostly just writing code, web browsing, watching videos, etc. It wasn't much but it served me well. It didn't give me any trouble until I started having problems with the power adapter not always connecting internally. A new power supply solved this temporarily, though now I suspect there's something wrong with the jack itself. Until this problem developed I had re-purposed the system to a spot next to my TV for playing movies and TV shows.
I got my MacBook in November of 2008. It was good timing as I was taking a course in system administration and needed a laptop that could handle a couple of virtual machines. I got a unibody MacBook 2 GHz CPU, GF 9400m, 2 GB DDR 3 1066 MHz (later upgraded to 4 GB), 160 GB HDD. Hope to get a 500 GB 7200 RPM internal HDD for it at some point, running out of space.
During this time I also had a desktop that I built I believe at the end of 2005. It had an A64 3500+, 1 GB DDR 400 (later upgraded to 2 GB), GF 7800 GT (later upgaded to a 7950 GT under warranty), 160 GB HDD, 20" WS LCD and 19" 4:3 LCD. This system is still my main desktop and serves as a file server for media and general files.