#1: Blender's Game engine sux, mostly. There is one main game which I have seen which isn't too bad:
Yo Frankie, however most aren't anywhere near as good as normal Game engines.
#2: If you have started modelling with blender, and never used any other 3D modeller, then blender seems pretty normal as an interface. I personally have no problems.
#3: For exporting, saving etc. blender uses a similiar system to linux. If you haven't used linux before, it probably will seem quite different, but for linux users, it's fine.
#4: The interface isn't perfect. It's probably never going to be like other 3D programs. Get over it, its a free program with as much functionality as Maya, you can't expect it to be perfect.
Once I was sad, and I stopped being sad and was awesome instead.
True story.