There is so much to see in Florence, than even in a day or two you realize right away that there are too many treasures to see in such a short time. And we agree: don't try to cram in everything into a few days, but pick and choose and you'll enjoy much better what you do see and do.
To better decide what to see, here are some suggestions as to the top sights that you should from. Take a look at itineraries as well, to help better plan your time. We recommend at allot at least 3 full days in Florence!