Interesting post I0540, that was the main reason (other than safety), why I asked the question.
All hypothetical of course, and it can be argued slightly irrational (although I feel there is enough statistical evidence to suggest otherwise), I would definitely feel more re-assured piloting something a bit more air worthy than a C-152 post PPL (not that I'm suggesting a C-152 isn't air worthy, simply that there are bigger, more comfortable aircraft for cruising in).