Hmmm, when I think back to my GM, I just remember good things. They were strict, but not in a way that was bad. Transparent on the guilds goals, and being quite firm that the guild was for progression not drama.
Led to a good experience, and quite fun. People looked up to the guild, since we didn’t go around bashing others, and kept our server up on the top 10 US list for a long time until MoP. By then, GM had a kid, some of us had RL things to tend to, so we all stepped down, but all look back fondly at our times in the guild, due to our GM and how they kept us together through some of the worst times.(M’uru pre nerfs, uuuuuugh!)