Set AE-L button to AF-ON Question

Ray and many others recommend setting the Set AE-L button to AF-ON but later Ray comment:

“h- With the 70-200 VRII, as I can't start VR using AF-ON I moved back to focus with the half press shutter button option. Anyway the camera works both ways: it’s a matter of taste!”

I use the 18-200VRII, should I let the focus on normal “half press shutter option”?

Thanks
Ed