Ah, what a waste of time.
Yea, drugs and pety vandalism are much better ways to misspend ones youth.
No, I think what I liked most out of Bk4 was simply the "Ironmongery" section. First, I'd never seen that word before, second it had all of this wonderful neat gear: Gauss rifles, Auto RAM grenade launchers, P/FGMP, etc. You could see the advancement over time as TL's grow from your basic Rifle on up to the better more sophisticated arms. Gauss rifles gyro stabilized with integrated optical site! w00t! How cool is that? I felt like Ralphie eyeing a Red Ryder Range Rifle with compass in the stock!
So, for me at the time, that was all pretty new. Somehow HG didn't surprise me as much, though I too spent much wasted time designing ships. I had an HG ship design program written in BASIC+ for a PDP-11, running on a generic "smart" terminal. But I never care for Naval careers. Just seemed pretty boring compared to the grunts on the ground.
Trillion Credit Squadron was more "interesting" than HG was.
By the time MT had come around, it was more involved and more complicated, but it wasn't really fresh any more for me like LBBs and JTAS was. More like summer re-runs in the early phase, and by the time of the Rebellion I had outgrown it a bit by then, so, you know, "who cares".
Just plain 'ol more Wonder in CT than MT, but that has probably more to do simply with me than the systems themselves.
It's quite different today when you can absorb it all at once and get instant answers on forums like these, compared to back then when your sole source for info was the quarterly JTAS and you made it up as you go.
Today, it's a huge universe populated with diversity, rivalries, and complexities. Back then, it was simply getting bigger every quarter, and you got to grow with it.