I'll take a crack at it..
Are you shifting at the right time? at the right speed... winding out each time, too early, etc. No way to answer this realistically other than to say that I tend to NOT wind the bike out. Certain peeps in my little riders' club are apparently labeling me as "aggressive" - but they rarely get within 10 mph of the speed limit
Do you brake correctly? front or rear only, both brakes at same time every time. Front and rear virtually every time.
Do you gas up correctly? upright,leaning over, smoking cig or weed. Upright, a few wiggles to make sure there's no air pockets.. (force of habit- I seriously doubt my tank is prone to those) Don't smoke.
Cornering? Lean into it or stay upright... plus giving it throttle as you enter curve Countersteering. Period. I suppose most would relate that to leaning. My bars don't move back and forth much outside of a parking area..
Both feet down at a stop? one on the rear brake or the other on shifter or both feet up on pegs. Depends on terrain. Uphill stop usually means left foot down, holding with rear brake.
Downshift to slow or pull clutch in and downshift into first while rolling to a stop?. Depends on what speed I am slowing down from. The higher the speed the more I will use the gears. Sometimes a combo. Downshift 1 gear, and then clutch in. (short distance slowdowns)
Shift while turning? before or after or does it even matter. *shrugs* Never really thought about it.
Ride in a vehicles blind side for fun or stay in front or behind it? I try to stagger with all vehicles. Impossible to avoid being alongside at all times, but I am aware of it and try to minimize.
Ride with traffic speeds or ride too fast/slow? If traffic ain't able to maintain the speed limit or a little more- I will do what I can to get around them. I'm happy at about 5 over- and will open it up slightly more for periods when it's clear.. Most of these dramatically slower curve speed signs don't get much attention from me unless it says like 20 or less... that's often a fairly serious warning.
Toot your horn often or crack the throttle for attention? No. The bike gathers plenty of it for me.
Wave with two fingers pointing down/sideways or always with middle finger only? well they can't really see your fingers anyway. Arm down unless I am caught off guard and try to wave quick.. then I might have my arm higher than I intended..
Turn around to look while merging onto highway or use rearview mirror only? Turn and look- always
Park sideways on a hill or up and down? keep it in neutral or in gear. Try to be at some kind of sideways angle front pointed uphill. I mostly leave it neutral, but I admit that I should probably not do that on a hill.
Split lanes even though not legal in your state? You mean like drive up between cars stopped at the lights? No. But- I stop like this:
Position myself to the far left or right of whatever lane I am in as I come to a stop. Stay in gear and watch my mirrors. The intention is to aim the bike at a hole to shoot straight ahead into if the stoopid azz guy coming up behind me looks like he is not going to stop. Once the car behind me has come to a stop- I will often then put her in neutral to wait out the light. That Vic clutch pull will give you Popeye forearm, won't it?