What breed of dog should I look for?

I have a boxer and she is a great dog.She is very loving and very protective.Boxers are very playfull.So if you go with a boxer you'll want to make sure your able to be active at times.They are very smart and learn fast.Will be your best buddy!!!! I have a cat and they play together.They have alot of dogs at shelters that have went threw many tests.Are they good with cats?Other dogs,do they like kids and so on...You can find a great pet there.You can tell them the things youd like in a pet and they will help guide you to a breed that will fit your needs.Good luck