Which lens do you use the most?
It depends on what I am doing. Lately it has been the 55-210 with 17x for birds.
If I'm just walking around with nothing specific in mind I usually take the 18-200.
The Tokina is my favorite macro. The 50mm 1.4 is great for shallow DOF.
I already had all of the OM lenses and was given the Tokina and Nikon macros :-).
Reality is that which, when you stop believing in it, doesn't go away.