For me, actually it's the GUI that has always ticked me off. I got used to the M$ style interface to use Imagine3D on a pc, [I'm originally an Amiga user but jumped platforms for obvious reasons] bought a broken version of Bryce2 off the Mxxx Computer shelf and never did get it working till I dl'd the free version and patch from Computer Arts mag so was ticked off to start with and then I ran head-long into that confusing interface with friggin' easter eggs instead of icons...well I gave up for quite some time till the free ver. 5 came along and I found a more stable app with a great commuity here, which i volunteered to Moderate, but still that interface that hates my wacom tablet for some reason so I wind up mousing around a lot...Don't get me wrong...it's render engine is amongst the best I've rendered with, and does a bunch of my favorite images here at Renderosity, but jeebuss, what I wouldn't give for a M$ styled interface. Betcha Bryce would get a lot more popular if it looked a lot less Kai-ish...feel like I loaded Power Goo or something sometimes when I fire it up...LOL...

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again