I’m a Sony user and have been for a number of years now. I initially went for a Sony because of the easy availability of old Minolta lenses. I started with an A100 and have now progressed (modestly) to an A33. Have been very please with both cameras.
So, my advice is to ignore the Nikon/Cannon snobbery that you find and enjoy your Sony!
Sony make the sensors for Nikon cameras to start with! Plus I firmly believe that they are one of the most forward looking of the manufacturers at the moment. Just look at the reviews of their recent cameras for proof!