Coming from D2 / D2R, D3 game play was very clunky. No skill trees, no mana steal on hit mechanics, overly bright rainbow colors, and most skills were throttled by cooldown timers. The result was 5 seconds of high DPS followed by 15+ seconds of auto-attack, rinse and repeat. The game play SUCKED compared to its predecessor. I felt like I was playing a downgraded game instead of a newer version. Even the D3 lead director was having flame wars with D2 fans on twitter claiming players did not know what they wanted in D3, but he did. Yeah sure buddy…
D3 matured quite a bit since the good old days, but I could never bring myself to reload it after hopping onto other games that provided much more enjoyable time sinks (STO, Division 1+2, etc).