Hmmm... yes, that "I built platic models at school" kinda comment really gets me worked up (well, okay, as worked up as I can get...)
But agreed, for other people, bigger is better. It's more visual, you spot it easier, you see more detail. My rather average attempt at the Ferrari 641/2 gets much more positive comments than a 1:24 car I just finished - which is much more detailed for the scale, better built, you name it.
43rd is untouched by me, but I've seen some guys doing to a 43rd F1 that they had to convince me the pics were really of a 43rd kit. Incredible what some guys are up to!
And yes, yes, yes... I have very recently built two curbside models. One a BAR converted from a Tamiya 1:20 Ferrari, I was pretty impressed. Then went ahead and quickly built a Revell 1:24 Jordan, really flying through it, just to get to the Revell "building process" before taking on their F2002. Apart from the one wheel ending a bit out of line, it ended up a much better-looking model!
What a lovely, yet completely un-understandable hobby we have! You build up a highly detailed interior (or bike engine) just to cover it all... As my wife says: At least you know in your heart what you did. And more importantly, it's something that takes you away from all the stress, etc for that while.