I am on a few private trackers but they don't offer anything that the public trackers don't already have covered for my use case, outside of porn.
I am more of a DDL pirate anyways. I have a seedbox for torrents but I tend to stick to mega links, even if there is a slight delay in getting the media. Typically what I find is that all the re-encoded high resolution h265 content comes later and is more abundant on the mega link forums than on trackers; most trackers will have h264 copies at 720/1080, but they're often larger than the h265 high resolution re-encodes.