DH is my absolutely favorite topic but I’ll try to keep this short 
He’s just the best person I’ve ever encountered. In 20 years, I’ve never once caught him lying to me, even white lies. He just does what he says he will. If it’s something he can’t do, he’ll tell you- there’s no game playing or messing about.
It makes me feel very, very secure because I’ve never had to second-guess his intentions.
He knows I can’t sleep with cold feet so, in winter, he puts a hot water bottle on my side of the bed an hour before I get in. Then, early in the morning, he replaces it with a fresh hot water bottle so that I don’t stir and can’t get back to sleep because of cold feet.
He just solves problems without any fuss or attention-seeking. He’s hugely knowledgeable about the most random things so, if I have a problem, he’ll know how to fix it.
Even little things- like, he just knows what lightbulbs every light in the house needs so if the bulb goes in the fridge, he’ll just have a spare in the drawer.
If it was up to me, our fridge would remain light-less 
He’s incredibly good to my family. After my mother had a heart attack and we moved in to care for her, the last thing he did every night was lay out all of her breakfast dishes and medication for the next morning.
He’s very shy but he attracts people to him. He messaged me last week to say he was delayed in the local supermarket. Turns out he was doing our shopping and an elderly woman asked him to help her get something from a high shelf (he’s very tall) so he ended up doing her shopping for her, carrying her basket, packing her bags, and then walked her and her bags home.
She gave him a pound 
He stores up things from his day to tell me and so we never run out of things to chat about. It could be anything from some gossip at work to something he read on Twitter or a fact heard on the radio.
I love that he’s always thinking about me and his default is to file things away to tell me later.
Anyway, I adore him and he’s all mine so I feel very lucky.