My older brother and father were really, really into fishing growing up. It wasn't all that fun for me, hanging around and trying to catch some stinky as hell, scaly animal I didn't enjoy eating all that much in the first place, but to my bro and dad, it meant hours and hours of fun.
Now I view fishing as a boring activity, but after a while, most things become boring too. What makes them great? Good company. I could sit around with a regular old deck of cards but if I have someone to chill with me I could enjoy playing with cards or building little houses out of them or toss them into hats forever.