I`ll post on here, rather than PFK, so Jeremy can`t delete it! 8)
For me, the Iwagumi is the most difficult scape to master, as there is nowhere for anything out of place to hide. The hardscape defines the look, rather than supplying the foundations for the final look, as in a Nature Aquarium.
As for the “jungle†look….is this an aquascape? :? Supply a tank, water lights, substrate and ferts, then buy a mix of plants off eBay and stick them in the tank and watch them become overgrown.
Reading between the lines, are “jungles†for those that can`t aquascape (no offence

), or is it a genuine type of scape? I`m not convinced.
Dave.
EDIT: Forgot to say...the Iwagumi is King in my humble opinion.