Yes - always did well at school right from the word go. Always around the top of my class at infant and junior school.
Did well in my GCSE's and 'A' levels without really working hard.
But at uni, couldn't get away with that, and so came out with a 2:2.
Found it very hard to discipline myself into working hard, when everything had always been very easy for me in the past.
DH was the complete opposite, didn't do that well at school, left after 'A' levels, and went back to uni as a mature student - came out with a 2:1 (narrowly missing a 1st). Very hard-working and disciplined.
(I'm a SAHM now, and I think my brain cells are slowly dying)