You don't have to force yourself to like something, it's stupid... Right now I'm trying to find gems within other genres, I still buy my psy-stuff but I don't limit my budget to just that...
Before I discovered ambient I was into a lot of alt rock, metal, now I've gone pretty much full circle and now am rediscovering why I loved these albums in the first place. Of course psy has a special place in my heart, but it isn't the only style of music to listen to...
Also, back in the summer I went through a mega progressive phase and bought up a load... now I'm not very interested, so I completely believe that it ultimately depends on your mood at the time!