Agree with DChesler; 1-4 are not going to be spectacualr images IMO, because of the difficulty getting into position to shoot them correctly. Perhaps with a perspectiv-correction lens, but otherwise they're always going to be slightly skewed. Interesting nonetheless. With respect to #5, again, agree. I think it should have been a longer exposure, starting when the train was much closer.
Just my $00.02 worth - your milage may vary.
~John