Judging by the regular season, the only two teams I am truly afraid of in the East are Miami and Chicago.
I actually think the Celts match up better with Miami then they do with Chicago as the Bulls just create a match up problem between their size (Boozer, Noah, Gibson) and their wings who can shoot (Deng.)
Not to mention if they get Rose back soon.
Other than that, I have absolute ZERO fear of the Knicks, Nets, Pacers, Hawks, etc.
I think the Celtics can waste all those teams and I still think they can take Miami. The Bulls are actually the team I truly fear the most.