Well, for me, the purpose of dog ownership is not to prove myself worthy of the dog’s love. I’m not looking for some kind of confirmation that I’m special, or the satisfaction that comes from obtaining something hard to get.
I like dogs because it’s so easy to make them happy. If I’ve had a shitty day at work, I can come home, and my dog will be happy to see me. If I take him for a walk, or play fetch with him, or give him a treat, he will be happier still. Even if I am just sitting on the couch, he will come up to me and be happy just being able to sit next to me while I absent-mindedly pet his neck. It makes me happy to make my dog happy.
It’s not about some kind of desire to prove myself worthy, or to obtain something “scarce” that the dog will not bestow on anyone else. It doesn’t make any difference to me that my dog is also happy to see other people. It’s just - here’s this creature, I’ve made it happy. That makes me feel good.
And of course, dogs are fun, which is the other half of the story. They are playful, and energetic, and they all have different personalities. Others in this thread have said it best, but I’ll indulge myself - they show their emotions, and they’re fun to watch. My dog loves to play hide-and-seek - he will bring a toy, and I will distract him while hiding the toy somewhere, or throw the toy down the hall and then hide somewhere myself. It is fun to watch him thinking about how to find it. If he can’t find the toy, he gets frustrated, starts snorting and grunting in frustration, and goes up to people trying to bully them into showing him where it is. When he finally finds it, he grabs it in his mouth and runs around the house showing it off to everybody (he pushes it into your leg until you acknowledge him, and then runs off to the next person).
Or, while walking him, he knows there are a few places on the regular walk where he can sometimes see groundhogs. He gets real serious, tunes out any other distractions, closes his mouth, sniffs the air, and scans the grass methodically. It’s hilarious.
As others have said, a lot of the fun of dog ownership is noticing the little things that make up your dog’s personality. This might be easier as your puppy gets older and matures a little. I can see how someone would consider hyperactive, frenetic puppy energy to be somewhat bland.