I also went for the diesel. This was my first and I was a little worried about the additional maintenance, DEF and other horror stories that get traded around. The reality is that today's diesel is not your father's diesel. The DEF is a minor inconvenience at most (IMO) and keeps the exhaust clean and odor free.
The tow capacity is more than I need, but leaves room for a larger trailer later.
The only real down side that I see to a diesel is the additional up-front cost.
You really don't know what you're missing until you try it. There's just nothing like towing with a good diesel power plant. It just pulls and doesn't heave breathe hard
As far as a diesel truck having a lower payload - well, that's true. One comment made it sound like going with the diesel removes a significant portion of the payload - this is not true. Just make sure you select a truck that will support your trailer profile. I went with the truck I did because it was more than large enough for my current trailer and any future trailer I may upgrade to in the future.