Where I live (SoCal) there is every kind of terrain from very flat to very steep.
Currently running Shimano 50/34 with 11-34 (12 speed) on one bike and 11/32 (11 speed) on the other. I don't really notice much difference between the 11-32 and 11-34 but the 32 cog is definitely smoother. At one point I tried a 46/30 crankset. I found it did not help that much, at some point you just need to improve your hill climbing so that you are comfortable on the roads you ride.
I am in that process now after being out of shape and it is long and gradual especially at my age.
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