I'm attracted to hard games; I like the sense of accomplishment that comes from beating a game most couldn't. That's why I beat Ninja Gaiden 2, got the PT achievement in Prototype, and perfected The Orange Box. But getting this G.O.A.T. achievement? It just doesn't sound fun. I'm no fan of achievements that require you to beg and plead, or keep up a weeks-long streak of luck as well as talent. And trueskill is barely comprehensible, let alone an effective yardstick. I generally like Rockstar games, long though they are, but I think I'll give this one a pass.
...Unless someone with high ts would like to give me this achievement.