Poser is better for character animation. specifically, faces gestures and poses (hence the title)
but is limited for doing other things like effects. better to use it with either greenscreen or bluescreen, then use Premiere or After Effects to render it with the background, which you can do in another, more easy-to-handle program.
if you saw those videos:
the "intro" was mounted completely in Max. and took almost 3 hours to render.
a new version I have at home is being mounted in Premiere. it's bigger and harder to handle, but each render took near 20 minutes
everything depends on what you're going to do, if you want to make ships, practice with Milkshape or AC3D. (
www.ac3d.org) a few months ago AC3D would have completely owned milkshape when it comes to user interface and controls. now they are more ballanced, and they will be more similar as time goes on.
if you want to make characters for bridges you'll need 3DMax for the skeletons and those things, but you can model in another program then port them to Max. Poser would do for the animations
if you want to make animations but not of characters, Max is the best choice. Gmax will help you learn the basics such as trajectories, lighting, keyframing, mapping and rendering, then you can move on to more expert kwodledge like constraints, particles, dinamic lighting, kinematics systems, phisics and such.
use the base saying I always used: if you wanna know how it's made, break it.
don't be afraid of making mistakes. learn from them, instead.