I do all my 3d on PC (formerly unix) and my print work on MAC. Video work I do in both. The 3D industry is predominantly PC and partially Linux. Although MAcs have MAYA the implementation is not stable yet. For 3D - I use Softimage and Maya on PC. One the MAc I After Effects and dozens of other apps.
ElectricImage is a great tool, although the character animation tools are a work in progress... but getting better with each release. The modeler is good, however it has idiosyncrasies that frustrate even the most experienced user.
I've been working on the dvGarage version of ElectricImage (no limits except 3rd party plug-ins are disabled). It's got a nice render quality to it... and fast. I have several copies for sale ($50 each) for OS 9 and X... trying to get rid of the upgraded version I've collected over the years. Lots of animator/modeler tutorials and such for beginner to intermediate (some are in PDF format, some are in QT which is nice).
Maya PLE is another app I'm trying to jump to as well.
I started out of Alias Sketch! 3D on the Mac... whatta app that was.
I didn't really have any formal training other than the Multimedia instructor showing us what the buttons did in Strata3d... I pretty much had to take it from there to learn anything.
One of the things I'd like to see more of on the Mac is Flash support. Currently (AFAIK) the only apps that support Flash are Strata and Amorphium... as well as Swish3d which the interface is kind of... er, crappy. Very un-3d-like.
All the work I do is more design/manufacture rather than design/print. So finding a balance between good rendering quality and output for manufature is an an issue for me. I love FormZ's modelling capabilities, especially in an industry where things constantly change. It lacks abit on both the rendering front and drafting side. Anyone had any experience with Mac CAD packages ?