It is interesting thinking of all the different connotations of "quiet" and/or "agitated". I think I could have done well as a professional student; I imagine that would have been quiet and unagitated but I don't know since I've never experienced that lifestyle.

I imagine Byron had the same problem; he lived a busy, "noisy" agitated life so what he imagined as "quiet" or "unagitated" was not necessarily actually quiet or unagitated. We all have a grass-is-greener (better or worse) tendencies. We can only know our own experience and imagine something else, not truly know it and how we would do were we to live it. But it sounds like Byron is saying he "likes" the agitation, hustle, bustle, and madness of his life because he says quiet and unagitated might not have suited him.