As spoken about in another thread recently, I was disappointed going from 10.4 to 10.5. I have a 2.1ghz G5 and noticed slowdown in everyday usage in 10.5's performance. There are a few major annoyances, such as how the Finder takes "forever" to load and it seems that the the OS loads and hogs more resources for stuff you normally wouldn't use anyway. I've also noticed delays in typing in Safari as well. 10.5 just seems sluggish compared to the 10.4.
Never used TimeMachine either, and that may be a good program and all, but there are other backup schemes out there. HD failures are not common on a Mac like they are on a PeeCee of course too, so not sure if a backup program that's built into the OS would be a "must have" for me. In fact, I have never had a HD crash on a Mac system... knock on plastic and aluminum! lol
I currently run 10.5, but would like to go back to 10.4 someday. Oh - and that huge month tag that distracts from viewing iPhoto's thumbnails is annoying. I wish you could turn that off. There was also a few features taken away for unknown reasons from the latest iMovie/iDVD too that was mentioned and sorely missed by the editors at MacWorld that I cannot remember. Don't use them too much. All I know is that the iLife suite took a hit too performance wise, but of course - there may be positive tradeoffs... just can't think of any right now. All aspects of the computer seem slower with 10.5 on my system and I did a clean install too!
Oh and ditching classic support was really idiotic. I really like the flexibility of running OS9 type stuff and had a few programs which still used it. My favourite version of Photoshop for instance. I've since replaced it with CS4, but what the heck - it's only money, right? :lol:
IMO - If you normally prefer stability and responsiveness to gimmicky bloat, you will be sorely disappointed in 10.5.
BTW: Anyone have any use for a boxed copy of 10.2?