Using 1600 iso and a red filter on a sunny day at the seaside has given an unusual look. Victorian. I like this photo of a very fat little man alone in the cliff-top landscape. I doubt that would work in colour.
The latest batch are on flickr, here.
I think slower film would have been better in the circs, but will bear this look in mind for future reference. And the red filter will probably be the default one for outdoor photography, (I'm really looking forward to getting Ayrshire's cloudy skies with one in the near future).
This is a goodish, brief guide to filter use with b&w.