I’ve forced myself to switch it up a little. I’ve been using a brush to lay down linework for more than a year, and it’s my general policy to change what I’m doing once I feel comfortable. I recently started experimenting with different kinds of pens, and I’ve come to respect, if not fear, the rapidograph. It creates a line with absolutely zero variation, and shifting lineweight is usually my bread and butter. This feels very limiting for me. I can’t wait to use it some more.