Would you rather an RPG with simplified rules anyone can learn in a few minutes, or advanced rules which are harder to learn, but more powerful?

I guess the question is self-explanatory. A two-tiered RPG system is easier to understand, but not as powerful for balancing. My four-tiered RPG system is harder to learn, but much more powerful for balancing and simulating combat.

What do you think?

Keep it simple/easy
Make it more advanced
Select gender and age to cast your vote:
Would you rather an RPG with simplified rules anyone can learn in a few minutes, or advanced rules which are harder to learn, but more powerful?
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