Of course, you need to decide for yourself, but here are the ones I personally find quite interesting.
Automotive: EV AND AV? Hard to beat. Just love watching this space, thinking about who will pull ahead and fall behind. Lots of change happening.
Energy: Relates to the above. Obviously, huge change happening here. The future is energy, there's no doubt. And, it's not limited to Solar + Wind. Hydrogen + Fusion are also fascinating spaces to watch.
Aerospace: Going to mars? Re-uasble rockets? Commercialization (and militarization) of space? Wild area as well
Ok, so yes this is Tesla, SolarCity, and SpaceX, but I promise I'm not just a Musk fan/follower (I'm not). This is just genuinely where so much exciting (and impactful) change is happening.
Healthcare: Amazon's getting into the space, outcomes-based healthcare is starting to come about. Leveraging data analytics to drive treatments/costs is also fascinating.
I find retail, cpg, media/entertainment, and finance as boring. Not a ton of change (feel free to disagree), and it's mostly just "let me try and sell stuff to consumers". And, changes here just don't really drive humanity forward (in my view). I.e. let me eat more, wear more, watch more, and make/spend more.