I would probably stay away from the terrier breeds,
or any breed that require a lot of excersize.

Toy dogs would be a great choice, but do not rule
out all larger breeds either, if you are willing
to go for long walks 2 times a day.
Some large breeds can be couch potatos.

Check out the different dog breed web sites etc.

Their is a Web site, but I can't remember the addy,
that is a questionair and matches the dog breed to your life style.
Maybe someone from Pet Talk will remember.
Might be Purina or something?