TGS riders don't have fun because they COULD do lines but don't.
When someone doesn't do rolly spinny moves, but does prefer riding lines, I call that proper trials.
To be honest, everyone does TGS, everyone looks at a gap between two walls and wonders if they could do it, but only people without imagination limit themselves to that kind of stuff. The cool part of trials is, 'I'll go to that thing, and then see if I can get onto that next thing from there.'