I run all the projects. Some people run one or two projects exclusively because they were moved by some story but I believe that all the projects are of equal importance. F@H is different because it exclusively studies protien folding, but I've been a F@H team member since way back in the day, long before we had our own little subforum.
I started out running two single core clients on my Athlon64 x2 5200+. Then I ran SMP. I checked out GPU folding once when I had my 8600GTS but I didn't run it again until I got my 9800GT.
Later on, I upgraded my CPU from that 5200+ to a Phenom 9500. It didn't overclock in my board at the time so I bought an AM2+ board. So I started overclocking... I tried setting it to run at 2.65GHz on 1.375v and my board cooked along with my 9800GT. This sent me hurtling back to a Sempron LE-1250, for I had already given my old board and processor to my Uncle, and my 8600GTS. I RMA'd my board and got a new one.
I wasn't folding anymore because I didn't want to fold on my 8600GTS and my Sempron was too dull to cut the cake. I had money to replace my "high"-powered parts, but I was content, that is, until my 8600GTS myteriously died on me. I rembmer I was playing BF2 on the Operation Harvest map, and I shut the game down because I was going to reboot. When I did, I was greeted with a 320x240, 4-color desktop. I went to change it back, but the Nvidia control panel wasn't there, so I went to the Windows graphics properties and I didn't see my 8600GTS anymore, only my on-board 8100. My 8600GTS was dead.
I spent about a month using the on-board 8100. I overestimated its power. It didn't run BF2 well, even with all settings turned down to low. The only things I had that were playable was Quake, S.T.A.L.K.E.R and Unreal Tournament. S.T.A.L.K.E.R was, for the most part, OK on the 8100 with tweaked settings, except in the psi-emitter control room (10-11FPS). I eventually found somebody here selling a 7900GT for $15 so I scooped it up.
A short while after that is when I found about about WCG. I decided to run this because WCG could do SOME amount of work on my Sempron, rather than taking two days to turn in a measley 240 point F@H work unit, the Sempron could do two work units in one day. I'm not sure what the PPD was, but I think it was around 300 or 400. Eventually I got fed-up with my 7900GT's performance levels, and after staring at the ASUS 9600GSO for $54 w/ free shipping and a $20 rebate on Newegg for a long time, I broke down and ordered it. I also caved one day later and ordered my Athlon64 x2 7750BE, which is in service today (at 3GHz). It took me a day to have my 9600GSO bios-modded to the clocks I wanted.
My 7750 was constantly crunching, but I still didn't fold on my 9600GSO. One day I decided to do so and I was greeted with some funky problems. The system would randomly hang or reboot. I eventually got it sorted out, with the solution set involving re-seating the card and clearing my CMOS, playing with the clocks until I eventually got to what I'm running on it today (700/1700/850).
I've also enlisted a few other setups into WCG, but unfortunately my 9600GSO stands alone running F@H. My mother's computer has a Sempron 3000+ in it that runs WCG, and I recently picked up a laptop with a Celeron-M 530 that runs WCG 24/7, but not at 100% because of heat. I run it at 60% and it already hangs at 75*c. My laptop is a great tool for me though. It was my Windows 7 guinea pig.
I also have (or had) a Pentium 3 750 enlisted, but that's another tale for another post. Short story is, the CD-ROM was buggered since day one. Half the time you put a disc in, it wouldn't recgonize that there was a disc there. Then I tried putting WinFLP on it (which really sucked) and it wouldn't give me my disc back so I had to crowbar the tray open. I tried Windows 98 (which sucked as well), so I decided to put Windows XP Home back on there, but my CD-ROM decided to go full-retard on me and it only boots off the disc about one time in 20, and when it does, it can format the drive and copy setup files over, but once it goes into the actual setup it will run for some undefined amount of time until parts of my screen go black and the setup locks up. I hope to get a cdrom for it, and when I do, it will once again join my little WCG army.