In Canada I've shot Whitetail, Mule deer, Elk, Moose, and Pronghorn, but when I did my first PG hunt in Africa there was something magical about it. Probably in a large part it was because I was hunting animals I had never even seen before! Africa itself has a magic to it that can't really be explained. I agree that you should take in the sights, the sounds, even the smells of Africa! Enjoy every bit you can. You had some good advice to take pictures, and take notes! I experienced so many things that had I not taken any notes, I think I may have had a hard time to try to remember what day was what, or what happened when! (I just used my phone)
I wonder if I would have hunted DG as well, if it would have taken away from the experience of the other animals or not. It's hard to say. They all have their own beauty and uniqueness, and I truly appreciate that. But on the other hand, I know for myself that I'm a bit of an adrenaline junkie, and maybe the shear adrenaline of hunting DG would have lessened the experience of hunting the other animals. I really don't know. What I do know is that hunting DG is something that I can still look forward to doing, and that as it sits right now, hunting PG has been a highlight of my life!
Each person is different, and I think that you should do what YOU want to do. It's great to take advice from others and soak in as much information as you can, but ultimately the decision is yours. For myself, my biggest setback is finances. If I had the finances to do it, I probably would have hunted DG long ago, and most likely on my first Safari. But, as I said earlier, it's something that I still look forward to doing in the future. Others may have absolutely no interest in hunting any type of antelope, and only have an interest in hunting dangerous game. So ask yourself, what interests you? And do you think that this will be your one and only time that you hunt in Africa? I thought that my hunt was my one and only time. I've now been twice, and covid-19 stopped my third trip!