I've recently tried to get back into tracking and I've found OpenMPT to be one of the worst modern trackers. Yes, it adds lots of modern features but its very poorly documented, there are barely any tutorials and what few do exist are more focused on "drawing" samples than actually using the program to make music. I also dislike that I can't quickly go through my samples directory and try a melody on each sample like I could with the trackers of yore.
So far, Schism Tracker is more usable I've found, but it feels like running Impulse Tracker in DOSBox, which, granted, it not necessarily a bad thing.
In the end, I may just suck it up and pay for Renoise.