The problem is you spoil yourself with the ease mods provide, and suddenly you can't take the vanilla processes anymore. I like playing vanilla, keeping up with features. It's universal. When you remove the limitations through mods, you lose that sense of accomplishment. Sure, you feel accomplished doing things in the mods, but they unravel the feelings of "Wow, I made something awesome." that keep you interested.
For instance, that auto-water-bucket dropper I had on the last page. Simple, but functional, and for vanilla. I'm proud to have put the old concepts together to make a useful setup. Mods remove that sense of success in creating such things, because they remove the limitations you'd strive to overcome.