I've only been at this for a couple months so I'm pretty new too. Once I really had the blade angle figured out, there's almost no resistance especially with the grain. If there's a lot of pulling using the correct shaving angle I think the blade probably isn't sharp enough. I was debating this question myself a few weeks ago. How do I know if it's the blade or my technique? Then one day it felt nice and smooth coming down my cheek and I realized it had been my technique that needed improvement.

Hope this helps and good luck!