How important are macros?

[seekified]

I'm a new player and I'm finding macros very helpful to reduce the number of buttons I have to manage. (...)

Example from DRG:
/macroicon "Chaos Thrust"
/ac "Blood For Blood"
/ac "Chaos Thrust"
/ac "Dragonfire Dive"
/ac "Haymaker"
/ac "Mercy Stroke" (Might not want to macro this if you need the finishing blow for healing when solo...)

First, macros don't work the way it seems you think they do. Second, that's a severely underperforming rotation for DRGs even if you'd do it without the macro. Third, why would you think it's fun to just spam a handful of buttons over and over instead of actually playing the game as intended?