Thanks @gmuxx ☺ I'm taking a break from illustration for a bit soon, but it's been a lot of fun and rewarding as well. I think my core focus is animation, secondarily minnow art and sketches.
I guess if you're making a city or factory, 30° is good, or, it just adds more isometric flavour to the mix. This Lee Hasler guy is REALLY pro at isometrics, but he uses 45°, which seems super steep - although it always works for him.
His creativity is off the charts!