No gaping things, despite quite different upbringings, me, single parent family, 3 kids, 2 different dads, (well, actually really it's 5, 2 different dads, 2 different mums, parents both married twice, and not to each other) me the eldest, bought up on a council estate.
DH, youngest of 6, 2 different dads, but MIL was widowed twice, bought up in a country village, DH's bro's and sis's are all older than my mum (my youngest bro is 11, his eldest is nearly 60). However there are lots of similarities. Our mothers are surprisingly similar despite nearly 40 years age difference, both barmy, hypochondriacs and dramatic. Both families pretty poor and both of us were the first to go to uni in our families.
The big differences are, despite my upbringing I was always pushed to go to uni and my mum was so proud. DH didn't do well at school but went to uni in his 30s. None of his family regard his education that highly, none came to our graduation. His family are lovely, but whereas mine are very tactile and overt his are always underwhelmed. When we got engaged the first thing his sister said was 'Hmm, let's see the ring then?' . My family always hug when we see each other. DH can go for months without seeing his and they'll great each other with a nod and 'Alright mate' (this is his sisters too!). They are lovely though, but I always feel like they don't like me. He says their ambivalence is a sign that they think I am family .
His family have long running feuds over money and don't speak for years, we don't mention certain members in front of certain others.
My aunties completely regress when they see each other and get very shrill and fight over things (handbags, collectable teddies and diamonds bought from bid-up TV ) but it's all over by the time they leave (thank God).