I finally got off my fat a$$ and went riding, so I had some time to think about this.

First off, who are these "friends" ansd why do they think your position should be more "aggressive"? And what does "aggressive" mean?

If you guys are seriously racing, then riding position is determined by performance, not appearance. The WorldTour pros are all down low and stretched out, but then they are professional athletes, and the best of the sport. That doesn't mean that you will have maximum power or speed just by imitating them. If you really want to find that last little bit of time to finish a little closer to the front, then first get a fitting, and next, buy a few stems and test saddle angles and stems. Just because it works well on the bike-fit machine, doesn't mean that it will give you max power and speed over the course of a race (also, crits and road races --which can include all kinds of climbing---might need different positions.) You might need to sit up higher or make other adjustments to get the most out of your body---and of course, that might change by the end of the season.

If you guys are just doing group rides ... then it really is all about the look, isn't it? In which case, who cares if they think your position could be "more aggressive"? What matters here even more so, is being comfortable enough to really put the power down when you want to while also being able to push for the entire length of the ride.

I used to ride as low as possible, but I realized my hip flexors limited me---even if I could get down ridiculously low, I couldn't use my power (what there was of it) because my hip flexors didn't work at teh extreme angle. So for me, the best (fastest and most powerful) position was a little less slammed.

Nowadays, even though I get lower by a few millimeters every few months, my "right" position is considerably more upright, because Looking "aggressive" is for poseurs. Riding well is what matters to me. I will continue to get lower for the aero advantage, but it sin't a goal, because i don't care if I look like a WorldTour cyclist. I care about being able to ride.

So, go get a fitting, it's the right place to start, but "more aggressive" should be measured with a stopwatch, not a ruler. Looking "aggressive" has nothing to do with being able to riding aggressively. Find what works for you, not what looks good to your friends.

Maybe your friends want to wreck your riding position because they are scared of how fast you are.