That's part of the reason why I dont tank and that is because it is much harder than any other role.
You have to know the layout of each flashpoint/op
Be able to avoid mobs( there are some crazy paths in flash points to avoid mobs
Know how to fight each boss
Know how to hold aggro well
Pulling adds and so on
Tank and healer tend to get blamed when ever there is a problem while dps almost never get blamed( dps just along for the ride)
Yep, that's why I have normally tried to two man them all with my roommate, so we can learn it - or try to run a time or two with a DPS toon so that I at least know some stuff.
This is a good resource thread: http://www.swtor.com/community/showt...=707035&page=5