That's a good strategy to avoid trading-induced stress. I still trade occasionally (mostly on Hive), but with so small amounts that even if it goes the other way I won't be affected emotionally. And usually, like on LPs, I prefer to trade between coins that I want to hold equally, like HIVE and HBD.
LP's are a great way to invest for me. I put in pairs like you where I don't mind ending up with either or the other token. It generates fees and I'm happy without stress :-)