We probably don't devote anywhere near as much time to shopping as we did at one time. And, much as I love to shop, I've never been able to endure more than 2-3 hours at a time.
We now tend to stick to our favourites:
Mall at Millenia - we usually visit twice per trip; invariably mid-late morning for a couple of hours, followed by lunch at The Cheesecake Factory, Brio Tuscan Grill or (my currrent favourite) McCormick and Schmicks. Since discovering Blue Martini in May, I think that could also become a regular component, so that would mean a good part of the day given over to the whole shopping experience.
We also still like the Florida Mall. I'd say we visit once per trip, plus the occasional, very quick sortie towards the end of the trip.
Other than that, we usually pop into Festival Bay to see what's going on, but rarely stay long. Ditto Pointe Orlando and Premium Outlets - both one time 'must-dos'. I also like to see what's happening along the restaurant row area of Sand Lake Road. We haven't been to Belz for years.
We also make at least one visit to Edwin Watts on Turkey Lake Road, but usually en route to somewhere else.
I'm assuming that you're referring to leisure shopping rather than for groceries, but over the period of a 2 or 3 week trip, we probably spend quite a bit of time in supermarkets. I sometimes drag dh (under duress) to the Albertsons at Dr Phillips.