The main thing I see with this situation is you are too heavy to board a PA28 as it has a 17st limit and unless your instructor is pint sized, performance on a C150 will be very limited, and not much better in a C152. These machines still form the backbone of the GA fleet but I'd imagine these fancy microlights they have these days will be more restrictive.
Never heard so much
in my life. I am 17st (6 foot 4) and regularly fly PA28s. The only issue I ever had was weight and balance in a PA28R-180 - and this was due to CofG too far forward so I had to add some ballast in the back to go "full fuel" by asking a friend to sit in the back, rather than the front.... I have also flown a C152 2 up - it's all just a matter of calculating your weight and balance correctly......