[@Dervish] That's all true. Within that line of thinking I have the idea that he wasn't ever going to find more respect in his Clan. Even though he is the first to beat his chest, he doesn't necessarily have the skill to back it up, and was primarily being used for labor. His being part of a clan never stopped him from being a grunt. By staying, he can look at the other Krogan as weak, due to their choice to leave, and compare himself to frail humans and such. He almost has more power due to not being one of many.

Maybe he enjoys implying that they should have just taken over the whole colony instead of leaving to begin with. Would have been like "the good old days".