Getting a dog didn't change my life but getting a puppy was a whole other story.
Cats moved out for 4 months - they're back now but live upstairs away from the dog.
The puppy stage drove me mad - you forget how totally hectic it can be, out every half hour for toilet training, less in the night but still exhausting, biting, no recall, training, puppy mania, can't leave them on their own for long.
Having said that, once they get past that stage, it's so much easier in general but days out can be a pain if not dog friendly, walks in the rain is fine but add in the cold and the dark, kennels are an extra expense at holiday time, vet bills etc.
I checked with family that they would be willing to dogsit but find that I'm reluctant to leave her for more than a week to go on holiday and it's a hell of an imposition on someone. I'd love to take her with me but won't give her the rabies vaccination so that's out. Am seriously considering a motor home and sticking to the UK.
But she's now family, even to my parents and friends, and I can't imagine not having the big eejit in my life. She gives so much and there isn't a day that passes where she doesn't make me laugh out loud ( usually swiftly followed by tears and frustration but I'll just gloss over that....)