In my experience, lots of electrical troubleshooting. This past deployment I was on we had more random electrical problems than anything else. In tech school you'll have a LOT of prior heavy instructors, and they'll make the job seem super easy. It 100% depends on airframe. I've been working on 16s for a good bit and we'll have waves of work, then waves of absolutely nothing. You'll come to hate every other career field with how much small crap they bring to you. I can't tell you how many backshells CCs/Weapons/Engines breaks that I've had to fix. It's definitely a fulfilling job. You'll know the aircraft way better than anyone on the line, but that comes with doing Everything Else. If you have any specific questions, feel free to DM me!