If you want to post your recipe, we can see if it's like the SNPA that you hate, or not. When you say the aftertaste, what is it you're tasting? Bitter? Citrus? Bitter citrus? yeasty flavor? Astringent? "Hot?", etc. Think about words to describe the taste. My husband only comes up with "funky" for Sam Adams' aftertaste, but I know what he's talking about. If we can pinpoint what you're not liking, we can help you make your recipe more to your liking.
Believe me, the first time I tasted SNPA I thought the same thing. I was a malt lover, and didn't like hoppy beers. But in the last 4 years or so, I became a hop head. About 3 years ago I started to LOVE SNPA. Now, I think SNPA is a very tame beer- kinda like drinking a Bud Light for beer snobs. Oh, don't get me wrong, I still love SNPA as an everyday drinker. I appreciate Sierra Nevada and Anchor Steam for leading me into craft beers.