I think my group reacts strongly to 2's, 3's and 12's because we already know they're (normally) failures or total successes before the player factors in their stat, which takes a moment of reference and calculation. 4's and 11's can be even more fun in their own weird way. "Too bad, you, oh, wait, +3, cool!" and "Yay, now you can, oh, -2, hmm."