Yes, my favorite lens is the lens that meets my needs at the moment.
16-85: Landscape, Indoor, Everyday, and when capturing a shot is very important
50F1.8: Protraits, Low Light, Street Photogrphy, and when I want to travel light, when I feel creative
55-200: Wild life, Sports,
Depding on the objective of the data collection exercise...
1) Everyone has different preference / interests what they like to shoot, versus yours. For me I define what I like to shoot, then I find the lens that meet the needs.
2) Even if the objective is the same, say for everyday walk around lens, everyone has different preference. A sizable number says 35 mm. I prefer a zoom lens say my 16-85 that gives me versatility. For protraits, some prefer 85, I prefer 50.
3) My favorite lens is also a function of budget. As much as I like to own a wide angle lens for landscape, becos of the budget constraints, my favorite landscape lens may be a compromise.
4) The postings may not be conclusive, becos it depds on who post here. If, for eg, a major number of macro shooters post here, you will get a skewed data sample.