I had traditional Medicare combined with a Plan F. This gave me close to absolute freedom in selecting doctors and have zero to very minimal copay. For this year, I fell victim to the advertising and took out a Medicare Advantage Plan, and I am nickel-ing and dime-ing my self to death with co-pays for almost everything.
I will go back to a Plan F for next year. Mayo Clinic Jacksonville informed me recently that they will not accept advantage plans anymore.
The advantage plans are OK if you see a doc for the common cold only, as soon as you need specialists they are way to expensive.

AND PEOPLE...be sure to run your drugs through the Medicare tool on the Medicare site to see which plans are cheaper. I was not careful last year and ended up paying $700 more then I should have. All because the tier 1 and tier 2 drugs were subject to deductible while other plans do not do that. There is an insane difference in costs between plans for the same drugs at the same pharmacy. I DO NOT UNDERSTAND WHY!