Here's a thought, and I throw this out being the most junior of winged aviators out there....
Sometimes those easy flights with cool IP's are good for the gradebook, but if you stop to think about them, sometimes you also don't really learn to correct your mistakes. And believe me, you are making mistakes, whether you realize it yourself or not. The guys that I see do the best in the air are the ones who are pretty anal about the details and doing things right all the time. I remember one flight in particular.....launch out of Palm Springs as a section, break up to do individual low levels, and then rejoin to come back as a section. Being pretty new at that stuff, I had a lot on my mind, and was probably focusing too much on stuff that was 15-20 mins down the road in the flight. Made one of the most epically amateur clearance/taxi calls of my life, and made us all sound like such. Rest of the flight went well, but when we got back, my IP hammered me on that call (cool guy, but like I said, a stickler for details). Averaged that flight (equivalent for you guys of straight MIF) just on those grounds alone. Had I been flying with someone else, I doubt it would have been that big of a deal. But he drove that point home, and it wasn't as much about making perfect comms....it was about being professional in every aspect of the flight. It's a constant learning process, but if you can be hard on yourself about those little details, you will see where some of these IP's are coming from.