I've always wanted to do something bigger, in theory, but in practice I always enjoy smaller pieces more- I can't help filling the canvas with as much detail as possible, so a larger piece would take a ton of time and would probably be not so great composition-wise. Maybe someday though! My canvases *have* gotten larger over time

Some day you've gotta try making a large landscape piece. You're able to cram so much detail I'd be interested to see what you can do big-scale. =)