I can't remember where I read it, but I recall a text describing the Sins as exaggerations of postive virtues in one extreme, with equally unpleasant traits being present if taken to the opposite extreme. This was used as an argument for moderation. Now that I type it out, it sounds vaguely Nicomachean (golden mean, and all that) but I'm not sure if the text I'm thinking of is indeed Aristotle or one of the early Christian philosophers, based on his principles.
Anyway, it suggested (for example) that Pride is actually a virtue, whereas in the extreme directions, you would have Vanity (if in excess) or Lack of Confidence (if insufficient). Likewise, Generosity would be the middle ground between Extravagance (if in excess) and Greed (if insufficient).
Looked at that way, I think my most extreme inclination is not Pride (as I suspect most would think about me), but rather Greed or even more likely, Sloth. My Pride is immense, but not disproportionate. Even my Greed is not all that excessive in the grand scheme of things most of the time. But my Sloth is remarkable.
My life is pleasant and successful in a number of ways, and I am happy with it... but if I were not so lazy, I could have done, and still could do, so much more. And yet I feel no essential disquiet at that knowledge, which only underscores why I really do think Sloth must be my greatest, most intense vice.