I keep going back and forth. I rode only Western as a kid. Then rode Saddleseat for a year. Then, after 25 years of no riding at all , started back into horses with dressage. 8 years of that, then back to Western, and now am getting back into dressage.
It's fun to change back and forth because it keeps your perspective fresh. Like culture shock when you go to a foreign country, then reverse culture shock when you come back to your own.