My favourite couples are:
Sonaze (Sonic and Blaze) because the both have eachother's backs and work great as a team. They are both supportive of eachother.
Shadouge (Shadow and Rouge) because they both work really well together and they have a strong bond in alot of games.
Silvamy (Silver and Amy) because they were totally cute together in Sonic '06.
Tailream (Tails and Cream) because they are both so cute together.
So what are your fave couples? Keep the flames to a minimum!