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Well?
When you line up on the grid, do you know the average laptimes for you immediate competition? Where they finished last weekend? What bike they are on? How 'hot' the bike is? If they do better during the first part or later half of the race? etc etc.
Some people will find certain information more pertinent than others of course.
By competition I mean the people directly in front or behind you normally in the sheets, along with the top 3 cats in the class.
For myself. All of the above. The one weekend I didn't do my homework (first weekend as a Amateur) I got burned by it. Never again. Personally I like to know the Name, Number, Bike, Apperance (leathers and paintjob on bike) and average laptimes of my immediate competition. Also I'll watch them like a hawk (har har) during other races, to see where they are strong, weak, and make passes. I like knowing what and who I'm dealing with when I come up behind them.
As I said, already gotten burned by lack of that information once. Still feel like a jackass about it.