What is the best way to increase body character? Is it a mashing technique?
Mashing at higher temperatures, adding crystal malts like carapils, or adding maltodextrin to the boil comes to mind. They all result in more unfermentables in the beer, which increases body.
This BYO article is really good at explaining all that goes into body/mouthfeel'
Invasion of the Body Killers - BYO May 1999