I guess I'll write about my experiences here too.
I (still) have a Macbook Pro from 2007, the first Core 2 Duo line. Started with 10.4 Tiger and eventually upgraded to 10.6 Snow Leopard, and loved that upgrade. I imaged my hard drive to an external using Super Duper, and bought/upgraded to Mountain Lion (skipped original Lion). Things worked, but overall the experience felt less smooth than Snow Leopard. Applications took longer to open, transitions weren't as smooth, and generally I felt the hardware was just not up to snuff. So I reverted back to Snow Leopard and am going to stay that way for the life of the laptop.
I have a 2011 iMac at work that came with Snow Leopard and I am still running on there, pretty much without issue. I have run into a couple of application lately that I was considering using (Kaleidoscope and CodeKit being among them), but they only run on 10.7 and higher, so I've had to go without them. They're not a deal-killer, but I can't help but wonder if my workflow would be improved by using them. Also, having messed around with 10.8 on the demo machines at Best Buy, I am sort of impressed by the revisions to Exposé (or Mission Control, whatever), and the multiple desktops. I use Spaces at work, but have been eschewing Exposé for alt-tab since I have tons of windows and I have to hover over every damn thing to even find what I'm looking for. So I'm considering an upgrade to Mountain Lion on the work machine, although I'm still hesitant to mess with something that isn't broken.
I (still) have a Macbook Pro from 2007, the first Core 2 Duo line. Started with 10.4 Tiger and eventually upgraded to 10.6 Snow Leopard, and loved that upgrade. I imaged my hard drive to an external using Super Duper, and bought/upgraded to Mountain Lion (skipped original Lion). Things worked, but overall the experience felt less smooth than Snow Leopard. Applications took longer to open, transitions weren't as smooth, and generally I felt the hardware was just not up to snuff. So I reverted back to Snow Leopard and am going to stay that way for the life of the laptop.
I have a 2011 iMac at work that came with Snow Leopard and I am still running on there, pretty much without issue. I have run into a couple of application lately that I was considering using (Kaleidoscope and CodeKit being among them), but they only run on 10.7 and higher, so I've had to go without them. They're not a deal-killer, but I can't help but wonder if my workflow would be improved by using them. Also, having messed around with 10.8 on the demo machines at Best Buy, I am sort of impressed by the revisions to Exposé (or Mission Control, whatever), and the multiple desktops. I use Spaces at work, but have been eschewing Exposé for alt-tab since I have tons of windows and I have to hover over every damn thing to even find what I'm looking for. So I'm considering an upgrade to Mountain Lion on the work machine, although I'm still hesitant to mess with something that isn't broken.