I like them all but the 15.. Imho, the 12 and the 25 share a profile of cereal, honey, heather, gentle peat and whiff of smoke with a lot of flowers (rose) in the 25, a very present oak and some strange stuff like Touron, turkish delight (hence the rose !) making it imho very interesting and veeeeery drinkable...!
But the profile I always look for in HP is the Honey/Chocolate and in this case 18 is for me the most balanced.. 30 looks to me like the 18 on steroids
The 15 would be my odd duck of the flock. Where do there citruses come from ?!
Enjoyment/price ratio wise *I won't say "quality/price" because imho, the quality is in everyone of them*, the 12 is my perfect everyday dram but the 18 and the 30 always win
My fav would be the 21 though. What a beautiful whisky !