lol at not having GOATro as no.1
, he's the most attacking player out there
No he's not, he just hits the biggest ball.
Del Potro is not the risk-taker that guys like Tsonga or Berdych are. He's much more likely to stay the course. His shot-selection usually ranges between deep balls up the middle or cross court, where he basically challenges opponents to withstand his power. He's often play percentages, and it actually makes him a bit predictable.
Edit: Just read Lenders' post, and he sums it up nicely.