I'm a man of simple taste, I like traditional BNB's:
Corner combos:
I like Cage's usual corner combo for whatever reason (2 1 F2, 2,2,2,2,2 1,1,4 nut-punch).
Lao's 1 bar corner combo (21 spin, jk/dk, jk/tele 3, 3 ex hat, jk/tele 3, 2,1 grab).
Han does some dirty corner combos with Cyrax (no idea about the inputs).
Mid screen:
Shang's 1 bar BNB always looks sexy.
Ermac's double tele combo.
And LBSH, as simple as it is, few feelings are as good as hitting Sub's 2,1,4 X-Ray combo to finish a match.
Also, do yourself a favor and watchTom's matches with PBoard player where PBoard goes full swag mode with Ermac in the corner, or Madzin's awesome Noob corner combo on Gross.
Pboard vs Tom (combo starts at around 1:30):
Madzin vs Gross (around 6:20):