Married for 38 years, 4 children, 7 GC & another due in September. Like all couples we've had our ups & downs, but no serious arguments, just 'spats' or heated discussions. If one of us is pissed off with the other one, we will discuss it calmly as it's best to bring these things out into the open rather than let them fester.
We recognise and accept that neither of us is perfect and it's our imperfections (as well as the positive things) that make us who we are. For example: he's rather messy & I'm a bit of a tidy freak. I've learned to be a bit more relaxed about his bedside cabinet being covered with piled-up half-read books, change, keys, penknife & other useful items usually kept in his pockets, packets of medication, various chargers & his 'open plan wardrobe' (eg: a chair with sundry items of clothing placed on it) - I will blitz it every so often & he will complain that he can't find anything, forgot to take his tablets or forgot to charge his phone/iPad/razor because I'd tidied up.
We've always told each other how much we love each other several times a day and why. We show appreciation for each other recognising when one has done something well or when one does something nice for the other. DH frequently tells me how good I'm looking, notices my clothes hair etc. Sometimes he will joke that he's concerned about letting me go out of the house on my own as he says I'm looking so gorgeous. He frequently sends me flowers for no particular reason - just because.
We encourage each other to spend time with our own friends away from each other as friendships away from the relationship are important.
Most of all, DH is my most favourite person in the world - the person who makes me laugh, knows when to give me a cuddle, knows when to just leave me alone or when I need to talk. He says that I'm the same for him. He's a great dad, used to work 7 days a week in our own catering businesses (we had 5 outlets - a couple of restaurants & 3 take-aways), but he found the time to watch the children playing sports, took them on outings, attended school plays and (unless it was a Bank Holiday weekend when we were particularly busy) made sure that he was home to read bedtime stories - even if he did fall asleep whilst doing this - which he did on more than one occasion. Now he's a fabulous granfur (Grandfather to those not from Devon or Cornwall) & loves chasing GC around, playing cricket & rounders on the beach, arranging barbeques on the beach or in our garden. We have GC to stay during school holidays & he's fabulous with them: cooking, playing board games, long walks with our dogs, helping in the garden & with our chickens, ducks & (at the right time of year) feeding the orphan lambs that we take on as well as visits to local attractions. No phones or computer games are allowed at Nanny & Granfur's house, they are left behind with mum & dad.
OK sex isn't as frequent as it was in the beginning, though more frequent than when we ran our businesses & had 4 children to run around after! I'm 63 & he's 70 & we still fancy the pants off each other & still retreat to the bedroom for the afternoon for a steamy session a couple of times a month. We probably have sex 1-2 times a week, but sometimes seem to be particularly horny & have it every day for a few weeks.