Honest question, why do you think that Numbers is unintuitive? Where does it throw you off?
Probably only because it's muscle memory at this point from using Office, but here are my pain areas;
Filters (turning them on/off & selecting seems more cumbersome)
Formatting cells (takes way more steps to do in Numbers) __> especially borders! Borders are so frustrating and enough to make me stop using Numbers
Pivot Tables and Macros - we use them
I try to use Pages and Keynote as well. The compatibility differences between Word <> Pages still cause me problems. I can't rely on doing something in Pages and have it show up 100% correctly in Word. I know the answer, PDF it, but that isn't always an option on a collaborative document.
Online editing and collaboration is a neat idea but in my work circle, everyone was turned off by it when we tried Google Docs. I don't think people would take me seriously if I asked them to use Pages online. The reality is the business world is still stuck with emailing files back and forth.
I'm stuck with either using Office in a Windows virtual machine (bad idea) or Office for Mac (worse idea)