Are you talking about how people often RP mundane, ordinary life things (hanging out, relationships, family drama) rather than BIGGER THAN LIFE plot-lines?

LynMars has it pretty much correct, imo. Azeroth is full of enough GRAND stories that it's often difficult, or even tiresome, to make your character a part of big/grandiose plot-lines.

My character is a baker and it's incredibly ordinary -- errands, chores, making deliveries. She has enough "BIG" stuff that she participates in on a regular basis (built-in Azeroth storylines via dailies, raids/dungeons) that it seems more normal for her to just be attempting to live a regular life in the midst of all of that. So, I spend more time focusing on her personal struggles, relationships, etc. That isn't to say that she doesn't participate in BIG storylines when necessary -- it's just not something I seek out. I think that she is an extremely well-rounded, believable character in what is often a larger-than-life world, and I think my focus on "boring/normal" stuff whether it's romantic RP or just daily life RP is what contributes to that.