My first and only Mac is the one in my signature. Its 5th birthday was last month. Still works great 99% of the time, but it's recently begun to struggle with Flash and anything that involves large or lots of files. I was hoping it would make it to year 6, but I'm probably gonna buy an Air this winter.
Mine is a nearly 5 years old- iMac "Core 2 Duo" 3.06 24-Inch running ML.
I have replaced the HDD with a Samsung 256GB 830 SSD and have maxed out the RAM w/ 6GB.
While it runs perfectly fine for everyday tasks, it's definitely showing its age when I do photography and video tasks. Rendering 1080p footage takes hours!!!
Got my eyes on a Haswell rMBP, just can't decide if I get a 13" or 15". If I get the 13" I'll also get a cinema display, (downside is it maxes out at 8GB RAM).
I will be testing the Iris Pro 5200 before buying though.
Works fine. Still on the first HDD and everything. Having come from a 15" rMBP (which I sold in anticipation of the new one coming out lol) it's a bit sluggish but it still does most thing I need it to do.
It it released in 2004 it wouldn't be a 'MacBook' yet. I think you mean iBook.
As for what Macs I have:
2001 12.1" iBook G3 600 MHz | 384 MB RAM | HDD upgraded to 80 GB around 2006 from dead stock 15 GB | Now serves as my personal webserver running on Yellow Dog Linux currently.
2007 13.3" MacBook (non Pro) 2.2 GHz Core 2 Duo | 4 GB RAM | 500 GB HDD upgraded from stock 120 GB, which is now in my dad's 17" CD MBP | Mac OS X 10.7.5
I was and still am somewhat tempted to swap out the dirty lens'd SupeDrive in there that I barely use anymore for an SSD of some sort, but I'm poised to get a Haswell-based rMBP in the fall. I could easily get a refurb'd high end model from this current generation, but 1) I don't have the money for the one I want, and 2) if Haswell's power management allows 12+ hrs on the new 13" MacBook Air I'm really curious to see how much it'll increase in the Haswell 15".
My late 2008 unibody Macbook 2.4 ghz, 250 GB HDD, 4 GB RAM. Got it that Christmas. Battery has over 1,000 cycles and probably lasts an hour on full charge, and my HD is almost full, and it's gotten soooo slowwww, but still works fine. Also gets hot much more often.
We've got an Oct 2005 rev 15 inch 1.67 GHz PBG4 that still runs but, it is rarely used now. An early 2008 15 inch 2.5 GHz MBP that's still in use and now a couple month old late 2012 2.3 GHz Mac mini.