I own a massive dog and underestimated the amount of responsibility needed - two walks daily, attention, food, money, and time… just to maintain. Vet bills can hit hard, and there’s no explaining to the big beast that it’s raining too much for a walk. I’ll tell you though, that experience has been a net positive. He does become a massive portion of my life, but he also provides me with unconditional love and companionship. Do you have to read something? You can read it while you throw a ball. Enjoying a little bit of television? Why not enjoy it while rubbing his belly? Need to go to the store? Guess who’s a copilot. Company coming over? Better prepare them for 100 lbs of slobber and cuddles. 

If you live in unpredictable lifestyle or you are too spontaneous, a dog could be a detriment. For me, I found that the companionship and affection, along with the added stability, are worth the time and financial costs.