Why is it so hard to provide a nice sample sheet for fonts? Just a paragraph (or just a sentence for display fonts) in the various weights would be a huge step forward in most cases.

Just compare the samples of Hallo Sans (the first font in this list): https://www.behance.net/gallery/Hallo-Sans-Free-typeface/132...

To that of The Enschede Font Foundry's Trinité: http://www.teff.nl/fonts/trinite/pdf/trinite_a3_print-600.pd...