I missed this thread the first time around back in November. Interesting subject! I agree with Paul and all the folks who have posted...there's just something really cool about viewing our trains at eye level (or above eye level)-- whether in a train shop or on a layout.
Here's an example of different views of the same locomotives...
Typical overhead layout point of view (looks OK):
Eye-level view (looks better):
And here are a couple looking slightly up (even better)...
As always, this is just my opinion!