Let's see, I've owned:
1 = 100 series
6 = 80 series
1 = 70 series
2 = 60/62 series
2 = 55 series
1 = 45 series
2 = 40 series
I've enjoyed most all of them save for a super crusty 60 series. They all have pros/cons and some are much better than things than others. I feel like I have a pretty good idea of the different models and their strengths and weaknesses.
To me the 40 series is THE Land Cruiser. Iconic. Top off, hardtop, simple, rugged, easy trail fixes Legend. That said, they are usually loud, slow, small, old and etc.
The 80 series is one of my favorite. Probably the best solid axle SUV, or just straight SUV ever built. Can pretty much do it all...Not topless, 4 door, larger doesn't have the iconic look like the 40.
The 70 series is just a great mix between the 40's and 80s and up. Tough, simple, proven, iconic (at least outside the US by far).
OPTIONS!!!!
2 door, 4 door, hard top, soft top, short wheel base, medium wheel base, long wheel base, pickup, diesel, turbo diesel, petrol, RHD, LHD, "70 series, A cruiser for everyone™". I'm trademarking that
For me, it was a BJ74, 2 door turbodiesel 5 speed removable top mid wheel base that hooked me on the 70 series. Basically a newer 40 series thats pretty comfy for trips and all sorts of weather.