A few questions for everyone in regards to messenger bags:

What are your preferences for messenger bags? What brands do you like? What features do you look for?

How much weight do you carry? How far have you found you can ride without your bag getting uncomfortable?

If you haul a laptop, do you like to use a separate sleeve or do you like a bag with a laptop sleeve built in? (Or do you just toss it in there with no protection cause you could care less?)