Is it worth moving to a smaller city?

Today marks my 3rd year in Germany, Wiesbaden
Great country, great city, great food, great people.
However, for some time, i personally was thinking about moving by myself to a quieter place since Wiesbaden sometimes (especially summers) gets really overcrowded while not providing the "Big city" benefits that much anyway.
I tried renting a flat on the outskirts but it gets a little too expensive and tiresome getting to crucial places in the city.

I'm still rather new to Germany and i don't know what i lose/get when i move to a smaller places.
Any tips are appreciated!