Let's take an informal survey here. Please answer the following questions:
1. Have you ever driven a par 4 hole? If so, provide one or two memorable instances, as these are memorable experiences.
2. What is your current handicap (to assess your general ability)?
3. What is your success rate when truly attempting to drive the green on a par 4?
4. To the best of your recollection, is your average score better when you lay up?
My answers are as follows:
1. I've driven one or two par fours in my life. Last year, I drove the Narrows hole, #12 at Chambers Bay, from the second set of tees, about 265 yards uphill. I two putted from about 15 feet for birdie.
Edit: I also drove #7 at Sand Hills the only time I tried to drive it. Two putted from 20 feet.
I once drove it to the fringe on #6 at Pacific Dunes and made birdie. Once I hit the top of the greenside bunker on #10 at Riviera, and needed to make an eight foot putt for par.
2. My handicap is 2.3 today.
3. I'd have to say I've legitimately tried to drive a par four about 100 times. Maybe half of those times I had zero chance to reach. I can only remember being successful twice.
4. Yes, perhaps 0.75 - 1.00 strokes better.
I've driven one legitimat par 4 in my life (and parred it, hah) (Note: I am not counting the time I drove a 240 yard downhill "par 4" at Rock Creek muni). Third hole at Rustic Canyon, 320 yards with the wind, went over the ridge and right to the back of the green (and then 3 putted). My playing partner knocked a 3 wood past the hole out of bounds. Note: On the 11th, 435 yards, with the wind going the other way, I hit driver, 3wd, 3wd, no terrible shots, to get it to the FRONT of the green (then 2 putted for bogey).
My handicap is probably over 20, and that's all I'm saying.
I rarely try. I sometimes "try" in the sense that if there's no danger, I'll still play driver, and if it gets there, it gets there. But if there's danger, I tend to lay up. I've got bad hand-eye coordination, but I'm not stupid. But when I try, I usually leave myself a decent shot over half the time.
I think my score is ABOUT the same (given that I won't go for it when there's a ton of danger), but I also think that the DELTA of my score (and as a bogey golfer, I'm quite pleased with a par) goes up when I go for it. The only birdies I've ever had on par 4s were short par 4s when I went for it, including once, teeing off on 10 to start a round from the back 9, when I didn't see the danger, and came within 5 feet of driving it past the fairway...into a lake. I then chipped to 2 feet.
I am disappointed when a course does not have a par 4 that plays to (note the phrase) under 300 yards, fwiw. I think those, along with short par 3s (particularly those with interesting recovery shots), are generally my favorite holes.