Here is what I know. I know you won't become a versatile fisherman unless you try different techniques. I know that just because you aren't proficient at some technique, isn't any reason not to try it. I KNOW that you won't try different techniques, unless you have one rigged up and ready to go.
Yeah, I am aware that every so often, by switching rods every 10 minutes or so (like I often do), I might get out fished by that guy who just keeps the same bait in the water all the time. My response to that is " So what?" That might be important if I was meat fishing, like I often did in my misspent youth, but I don't do that anymore. It isn't that I don't like to eat fish, I do, but generally after a day on the water I am tired and sweaty and the last thing that I want to do is clean a mess of fish. I would rather stop somewhere on the way home and get something to eat. This applies mostly to bass fishing, on those rare occasions when I go crappie fishing or cat fishing, I am aware that at then end of the day I am going to have to clean some fish.
Yeah, I carry many lures when I go fishing. So what? If I had a bigger boat, I would carry more. On an average day, when I go fishing by myself, I will have 20 or so rigs in the boat. Even if you just have a few baits for each rig, that adds up. Why so many? Easy answer - You can buy rods & reels & baits. You cannot buy fishing time. Just can't - it isn't for sale. If I can save fishing time by just picking up another rod & reel that is already rigged up - as opposed to stopping, cutting lines, selecting different baits, retying, etc., that is what I am going to do. The problem of fishing time is one fishing problem that can be partially solved by throwing money at it. I don't mind losing baits. I don't mind re-tying as part of normal fishing maintenance, like every so often, when you are throwing square bills into bushes, you need to re-tie every so often as your line gets nicked up. Stopping just because I want to try a different technique irks me.
When I used to do tournaments as a co-angler, I would carry 6 or 8 spare spools for my spinning reels and 3 or 4 bait casting reels. If I got a back lash and determined that it was going to take more than 3 or 4 minutes to untangle it, I'd just swap out spools or reels as necessary. I know that is carrying time management to an extreme, but hey, we all fish differently.
About fads - I like fads - they give me a reason to buy more tackle. I have been on both sides of the fad thing. I have seen guys, right in front of me, load the boat using a technique or lure that I wasn't comfortable or proficient in. Also, I've been the only guy on the lake with a wacky rigged Senko, fishing within talking distance of guys who were throwing jigs into trees, and right behind them, drifting a wacky rigged senko down the shady side of a tree trunk and getting bit cast after cast. As a responsible fisherman, it makes me feel good that I am doing my part to support the fishing tackle industry. I spend as much money in my local fishing tackle stores as I do with the larger, national stores. The local fishing tackle store is one place where I can go, and KNOW that they will be nice to me. I know that is indicative of deeper, self-esteem issues, but again, hey, so what.
I read many articles about fishing. I am fortunate in that I have the time at work to do that. I never take that they are saying at face value. You always have to adapt, in your mind, how what they are writing about might or might not work on lakes on waters you are familiar with. Long ago, that was one of the founding principles of In-fisherman magazine and how well the article helps you do that is the difference between a well written or poorly written article.
So, anyway, I think that versatility is something that you strive for, just as part of the trip to become a better, more talented fisherman. This year like every other year, I have things in my mind that I want to get better at. For instance, in the past few years I have gotten away somewhat from light line finesse fishing, so this year I'm going to be fishing a Ned rig some. I am going to fish light (5/16 or less) crank baits more, so I put together a spinning rig that will let me do this. I am going to focus on Eakins jigs more ( or similar brands & weights) kind of a finesse jigging approach.
This doesn't mean that I am going to leave any of the other rigs at home. I just like having all the options in the boat, ready to use.
So that is going to be my initial approach to fishing this spring, like everything else in my life it is subject to change. I am not a major fan of change, but I'm not feared of it either. We'll see.