I agree. I've done the bare minimum math needed for comp sci (1st year calc + basic probability/stats). Barely passed. In preparation for masters in financial engineering next year I've gone back to basics, worked through his calc 1 & 2 (3 todo) videos and I'm amazed at how much I enjoy math now. Thoroughly enjoy how he teaches the content -- the enthusiasm is really infectious.

Does anyone have suggestions on exercise material? I spend some time with Wolfram generated problems every few days and am working through two textbooks, but just wondering what other people find helpful.

I too like his teaching style. Started from the beginning. Prealgebra. Working my way up and math is fun now!

If you aren't already familiar with them, you might also want to check out the stuff by Gilbert Strang (Calculus and Linear Algebra), MathBFF (pre-calc/trig, calculus), and PatrickJMT (little bit of everything).