In general, if I get less than 150 miles before having to switch to reserve, I'm disappointed. If I get over 160 (as I have done this morning) I am a happy camper. When I fill up, I have the bike on the side-stand with the front wheel pointing straight forward rather than to the left; I think this raises the angle ever so slightly so I can fill up.
If I do some two up riding, I am happy with 150. However, I prefer to ride alone and normally drive at between 50-60 mph (I guess). When doing a trip to my dealers on the interstate, I tram along at 70 mph (or a little more) for 40 miles, which drops my 150 to maybe 140-145.
The bike is now three-years old and seems to have "settled down."
Siggy