Musee Rodin: most romantic, The Kiss, check out ramblin’ rose-scented sculpture garden, The Thinker

How much time? taken from tripadvisor:

• an hour & a half can suffice, but on a nice day you might wish to spend more time at the Rodin Museum’s lovely garden (quite big, a park really)
• We’ve been to both a dozen times and never experienced a wait at the Cluny and never more than 15 minutes at the Rodin.

<see museo table somewhere>

Paris Museum Pass