I have to agree with everyone as well...

It may have had something to do with breed, because you said that you didn't have time to play with him, and collies are playful and energetic dogs. But for the most part, I thought you were just saying that you didn't have enough time for him.

He's such a handful. Nobody in my family, including me, can give him the time and attention he needs. I'm too busy with sports, music, school, and other problems to find time to play with him like he needs to be played with.
I still want to do agility, so my next dog (way way way long time away)
It really hasn't been a long, long time at all..

In my opinion, GSDs need alot more mental and physical stimulation than collies. GSDs are more serious working dogs. They also have alot more training issues, because they are dominant and can have aggression problems, and training is really non-stop. GSDs are SO smart and can really keep you on your toes. I agree with Shelteez as well -- GSDs are the breed most prone to hip dysplasia. You will have to be very careful picking a dog if you want to do agility. All of that jumping is good exersise but it can really wear down the joints.

You said that you made the right decision for Ozzy...But are you sure it wasn't the right decision for yourself?