After watching the marathon, one thing that makes me place Begins at the bottom of the barrel is that its the only climax in the series that wasn't particularly exciting.
The people screaming in terror from Scarecrow's gas, the final confrontation with Ra's, and the train conductor who explains the action to the audience as if we were morons...it all is so boring.
Also, as villains, Ra's and Scarecrow lacked the...bite of Joker, Two-Face, and Bane.
Bane is an extension of Ra's. I find the original idea of 'justice' without trial horrifying and depraved. Bane is just a copycat wanting to be loved by a woman that can't because she's too bent on revenge. How pitiful.