"I try to take into account all the info but opinions vary so much I feel I have to leave it to my own research"
Bingo!
After trying so many diffrent techniques and having a similar outcome everytime there comes a point where you feel lost.
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This is really frustrating. Been there, I'm sure we all have, I almost quit brewing once I was so fed up with it. But this is the point where you start learning. It's not easy, but this is where you start trying new things and pushing boundaries.
I know you're focused on hop flavor, and so the responses have been hop related, but another thing that jumps out at me when you say all of your beers taste the same, is your base beer.
The malt bill is "usually this", same yeast, same water treatment etc. If your base beer is the same and all you're varying is the hops, the differences between them may be more subtle than you expect. It might not be a huge difference. Maybe start varying the base beer to see what plays well with the different hops? Something light and dry with juicy citrus hops, something darker (red/black) with dank pine hops etc. You might hit on something with that brown ale since it's something different.