Artur Tenczyński has shared a type collection of explorations that are creative and divergent to one another. I am sure if there are commercial or personal explorations but one thing for sure. It's inspiring!
I love typography experiments. It bring me back a lot of memories of my early days. I remember spending hours checking out books on graphic design, and there was the now legendary Los Logos book, which featured tons of logos and type experiments. Wete Studio just shared a published an awesome post where they share a lot of beautiful typography experiments they did between 2017-2018, most of them are personal projects exploring cinema 4D and photoshop (except one project for the Yorokobu calendar and the letter O for SEAT).
These compositions illustrate really well what I am talking about on the first paragraph so make sure to scroll down and get your dose of inspiration. Also visit www.wetecacahuete.com for more information and full portfolio.