Perception of ones "prettyness" is subjective (eh. like, really really subjective...) so no way to quantify it, except perhaps by sharing real life experiences where your presence has put people in obvious attraction states. Since I'm presenting andro...
-- Average looking women may smile and blush when you are speaking to them. For instance, I've seen this with food service counter girls. Some drop their eyes in deference. Some lose their train of thought. I recently saw one DD counter gal who I'm flirty with and who knows my medium sized iced caramel late order upside down. Was presenting the best version of me that day (2 weeks after laser). When I approached she 1st acknowledged me, but then seemed to become so confused, she asked twice what I wanted just to look at me and walking back and forth from the task, also if I wanted milk or not (duh?), and then what size? (hello? med you know me) and/or splenda? (no sugar and caramel regular!) The counter guy who was taking my transaction shook his head. Yeah she was confused. Or maybe star struck?

Needless to say that was funny.
-- A married guy with an average looking wife who knew you as a guy and is straight as an arrow (yet doesn't know you are transitioning) may start to notice 'attractive' things. You'll catch him looking at you in your peripheral vision, then it builds up to the point where they're asking you silly technical help questions so they can have a moment to see you. Or it's the, "can I have one?" ahh the fresh slice of orange I'm holding between my manicured fingers while typing on the lappy with my other. You motion yes turning your pretty thumb and index fingers with the slice, still typing waiting and he bends down and slowly grabs it WITH HIS MOUTH. WTF? Dude, we don't do that with other "dudes!" o.O
-- Single girls at Starbucks who are like deer in headlights looking at you when waiting for orders. Girls who seem to linger around you at the condiments section pretending they are busy, spending a full minute to stir their already blended beverage

Maybe I should open them in conversation... (and unfortunately for me, some guys are doing these things too).
-- Friend girls who in casual social encounters (and who "don't know" yet) starting to give you 'the gaze'.