>>96800673
Space Marines are fundamentally cool as fuck but they become increasingly dull through overexposure to a point other parts of the setting seem cooler by contrast because you haven't seen them 70 gazillion times
It also doesn't really help that space marines all virtually have very similar personalities and ideals by design which makes them boring to accompany for extended periods of time, you just have far more character possibilities with a inquisitor's entourage, a rogue trader's crew or a guard regiment while space marines are relativly very samey within their own chapters and in fact should stick to being that way, hell space marine differences aren't even particularly pronounced when you put marines from different chapters in the same room
Marines are cool on paper but you really lack in possibilities with them as compared to other factions that the only real interchangeable point is a chapter's history, gimmick and culture from their home planet while characters stay virtually the same
Marinepiggies will eat ghastly rigamaroles like the Horus Heresy all day though so the exhaustion will hardly ever truly fade though im seeing an active effort from Games Workshop to tone down their marine releases as of 10th edition because most of the primaris revamps from 8th-9th are already done