Our general impression from being cycling tourists in Italy is good. The landscape is often hilly, with charming medival cities and villages.

Cycling route suggested:

Round trip from Firenze (map link)

Firenze – Panzano in Chianti – Monteriggioni – San Gimignano – San Casciano in Val di Pesa – Firenze

Also the coast from the French border til Savona is really beautiful (see Nice to Savona under Longer Routes).