When it comes to Sienna Mercato, I can not choose a favorite level. To me they are all great.
Mezzo is different because they take reservations (which is almost absolutely needed when something is going on in the CD), where as the first floor does not.
Their menu tends to have an Italian flare that always suits my fancy in one way or another.
From the small to large plates, I always tend to have a home run whether it's fish or a piece of beef. Though, salmon tends to be my go to since they tend to prepare it a different way every season.
I have had two different tartares (salmon and beef) and they were fantastic.
The desserts are always very scrumptious and they usually have a great variety to choose from.
And the drinks O.M.G they are a must! Between the drinks and the wine list, I am always in heaven (it probably feels that way after a few drinks, but still)!
The service is always attentive and very helpful. Never had a complaint in that department!