Make your pitch for best dog breed

[Gunnyart]

I'm not ready just yet to get another dog as it's only been a week since we had to put our Aussie mix pound rescue down after 14 years with her.

I want to put some thought into our choice this time, so...
With so many options, sell me on why you prefer your chosen breed.

FYI
I'd like a dog that will travel well
isn't aggressive
isn't gun shy
Prefer a medium or slightly bigger sized dog
Not planning to train it for a particular job but it would a bonus if it could fetch up downed dove.

I'm sure I'll think of some other requirements as this goes on.