I've tried 'em all, being my favorite AT, and unequivocally, Plant/Storm was my favorite to play to 50 both solo and on teams. A real mixed bag for most situations, great pets, great damage, and big on giggle factor with Audrey 2 running around the battlefield. I tend to rate playstyle and fun over min/max numbers, so if you haven't tried this combination, I highly recommend it.