You are right that there are a kind of "fullon feeling" in his (Penta's) basslines, I dunno if any one have said anything else... but for me there are much more than basslines in music (I know there must be for u too)... so thats why I can't agree on calling his music full-on, that was my initial statement!
I also agree that "darkpsy" is not always very fitting for the "darker" music's nature but its alright as a rough description IMO anyway. At least thats how it works in a practical sense. Thats how I see that the term "full-on" has become, its not just a description of : energetic music to dance to, but a term of music which describes a style of producing music. Thinking of the style we have seen spawn in Israel since late nineties (as the earlier Full-on series from HOM-mega might have hepled promote, I mean the name and maybe later on also style I dunno). What I mean is that when most people today talking about full-on they are talking about that!
But I fully understand what u mean that the term full-on not originally was refering to a more or less specific genre or style but time has made it so.
I hope what I have to say make some kind of sense...
Its friday night here and I should'nt be sitting here writing.... aha have to get earlie in the morning and study