Alpha2:
While anim8or has one of the easiest to understand user interfaces the problem is that it's a hobby program and it's not going to teach you how other programs work.
I have to disagree with you about that last part of that statement. Sure Anim8or doesn't have all the the special bells and wisels that professional 3d programs have like IK, some type of physicis, and special modeling tools such as boolean, shrink wrap, deformers, etc...
But the modeling interface is all too familar with other 3d programs like maya and 3ds max. I use maya now, and when i first opened it up I saw all of these menu options that I had no clue what they did or how to use them. But when I saw the left side tool bar in maya, the first thing that came to mind was, hey that looks just like anim8or.
With that aside, after using anim8or for about a year and a half before I got maya, I already knew the basics of what I wanted to do in maya, which is model a desent character. After the model is done you can move on to special effects and fancy rendering. If you want to talk about programs that looks alien compared to professional 3D programs, take a look at Blender. Blender is a great program as well, and it can do all the things that professional programs can do. But Blender relies to much on key board shortcuts, rather than menu items, and you have to look really hard to find the menu that you are looking for, if it even exist. Like there is no move tool in blender. You have to right mouse click and hold to move what you want to move. Professional 3D packages like maya and 3Ds Max don't do that.