Several years ago I too intentionally moved to limit my hop usage by what I can grow. I think I've achieved that goal without sacrificing variety of hop flavor and aroma so I can brew any style of beer I'd like. It's been very rewarding and good work and I've developed many "go to" recipes that I brew regularly.
However, I'm still setting goals as personal challenges. I'd like to really master a recipe for a coffee/vanilla porter that is a homage to a very low ABV porter that Hill Farmstead makes as a draft-only offering. I've gotten good beers from this quest but it's not there quite yet.
I think the fun part is that we have access to a lot of great ingredients and also that there are people out there thinking of new ways to produce new malts, hop varieties and yeast strains. We have a lot of things in front of us that were not here when we started brewing. Over time I got away from things like "yeast where you can ferment at 90° and it will produce a pleasant pineapple-strawberry character with a hint of buffalo fart and broccoli burp". Sorry. I made that up.
The same is true for hops that produce a lot of that character. I tend to stick to a lot of traditional styles and so traditional ingredients. If I want to make a fruity pale ale or IPA there will always be Citra, Amarillo, Galaxy, and of course, Cascade. My itch doesn't require much more scratch than that... at least in that department. I'm not trying to minimize these things because I know many of you are all about it and that goes back to my point about how lucky we are to be surrounded by such great ingredients.