I’ve been going through our photo archives looking for images for my wifes holiday web site.
On countless photography sites the advice to budding photographers is to “crop tight” and not have too much dead space around the primary subject. This is often great advice for the average photo, the subject isn’t lost in a sea of nothing and your viewers don’t switch off.
There are always exceptions to rules, and here’s one to the cropping rule.
If you think one day that you might want to use the content in a header, either online or in marketing material you’ll want to crop it tight horizontally and be glad you had the dead space top and bottom. Cropping vertically is often used for “Skyscrapper” web adverts in side bars.
If time and the subject matter allow it my advice is to take a mixture of shots so that your photo library can be used in different ways. If you can take multiple shots to stich together into a panorama do so too.