The order I like the Precure series from best to worst (I like all of them though.) This will probably change as I finish them.

• Wonderful Precure
• Hirogaru Sky Precure
• Go! Princess Precure
• Star Twinkle Precure
• Heartcatch Precure
• Tropical Rouge Precure
• Smile Precure
• Doki Doki Precure
• Delicious Party Precure
• Hugtto! Precure
• Kira Kira Precure a la Mode
• Happiness Charge Precure
• Mahoutsukai Precure
• Yes! Precure 5 (haven't yet watched GoGo or Otona)
• Futari wa Precure Splash Star
• Futari wa Precure/Max Heart
• Fresh Precure
• Healin' Good Precure
• Suite Precure