My playstyle consists of HDHR for tow reason: the ar10 of HR, and elimination of approach circles of HD.
Quick summary of HR: I like the speed between notes, is more enjoyable for me/
As for HD:
My eyes get easily overwhelmed by the amount of input. Notes, sliders, numbers, but more considerably: approach circles. The bpm of a map wouldn't be my main problem, but the approach circles certainly are. When trying to process all the information, my vision gets distracted and my moves get locked. Following the rhythm of the song with HD is remarkably easier for me than just expecting the AC to get as close as possible and hit the notes