It's not all sunshine and roses.
It's rarely sunshine and roses - there's always something grey on the horizon in my experience. It doesn't make a pessimist per se, but I do hedge on realism.
Today for example.
Note to self: just because the dog is all bouncy doesn't mean that he isn't hurting somewhere. Take care when handling him - he can't speak nicely to say "Owch! Put me down!"