Just re-watched it. And even though I loved Batman Begins on it's own, I watched them all as a trilogy. And I just felt Batman Begins was very, weak compared to the other two. TDK and TDKR felt much bigger, and Batman Begins in comparison was just under-whelming.
TDKR was the best BATMAN film, but TDK was the best film overall. While BB was good, it was a notch or two below the other two IMO.