Shadowrun is the coolest. The mechanics aren't the smoothest. Some things are probably over complicated. Don't care. It's my favorite tabletop RPG. Nowhere else offers the specific mechanical ability to build a character good at everything because of lucky and then take the bad luck trait so every time you use your luck, it's literally a roll of the die before you roll your check.(and still be a good character). I also love the mash up of cyberpunk and fantasy.