I think Tom hit on it, starting the ball toward one spot when you want it to end up at another. If I were a good player, I'll bet I'd fall in love with working the ball right-left-high-low at every opportunity. Unfortunately, I don't have that kind of control over contact with the ball.
Wind, green contours and/or a firm-and-fast ground game can provide that sort of opportunity to players of any standard, 20-handicap short/crooked hitter included. When you get all three of those working together it's almost guaranteed to be a fun day for anyone not obsessed with seeing small numbers of a scorecard.
I recall a shot several months ago at my home course where a layup had gone offline and ended up with a tree between me and the hole. But I realized that a ridge down the middle of the green would kick the ball over toward the hole and that a shot right of the tree would be blown left by that day's wind and catch the ridge. I pulled it off and seeing that ball drift left, left, left, barely catch the crown of the ridge and then roll toward the hole (and yes, I actually made the putt too) was about as fun as anything could be short of maybe holing out for an ace or eagle.
I had an epiphany on the last day of my Buda Cup trip when I played the first few hole at Ganton on a breezy day. I've always considered fairway bunkering to be a ridiculously overblown obsession of this group and of golf-course lovers in general. I mean, sure I get the idea that you can offer a half-stroke hazard to the golfer who slightly misses the most desirable line on his tee shot. Too-widely avoid the bunker and lose maybe a half-shot by being out of position, go in the bunker and lose a half-shot by laying up. Cut it close and get the ideal approach shot. All well and good but it ain't the most important thing about a golf course.
But if the wind is blowing AND the bunkers are artfully arranged AND the ground is firm enough that the ball can roll into a bunker OR roll around the bunker if properly struck...now that's a magic formula there. It has nothing to do with shaggy versus flashed edges or the color of the sand. It has to do with the interaction of the bunker's location, the ground contours up to 40 yards away from the bunkers and the various optional paths to the green (air+ground) that arise from that day's wind and ground conditions.
Under those circumstances, it's all about the bunkers and those tee shots come to life. So to add to Tom's statement, fun is hitting the ball to Point A in order to get to Point B while avoiding Point C. Fairway bunkers and wind are one way to do it, green complex contours and greenside bunkering are another. Heck, I love greens where the penalty of having to fly the ball over a fronting bunker is ameliorated by a backstop of sidestop if you fly it in on the proper line. That works with no wind or it can really get fun when amplified by being downwind. It's all fun.