livegolf - Your stats are really close to mine and what I posted in the opening. You'll eventually remember your 'average' length for the different holes and make it a mental challenge to 'give yourself a chance' at a birdie. Boy do I get pissed off missing a very makeable birdie putt on holes that are longer than my average and the opportunity for the average to increase.
If you are concerned about how much fun a driver and wedge would be on par 4's, you are hitting it a lot longer than me. My average tee ball is about 220 yards (including flat out bad shots) and my average birdie yardage on a par 4 is about 160 so I have a reasonable chance to birdie any 380 yard hole. And that for me is a driver and six or 7 iron which is 'fun'.