A dog, lot of company, well, a lot of work too. But I do not walk alone (unless berry picking or mushroom hunting), it feels weird to go for a walk alone. I have tried that.
Cat would be nice too, butt... there would be butt on my counter, butt on my table, butt on my pillow*, butt in a pot.. Too many places after a litter box were a cat would go. Propably a cat would nock my stuff down from shelves and feel satisfied while doing so.
I once went to a friends house for a coffee, and her roommate had cats.. Well, it was a interesting coffee time, cats we on the table while we were drinking coffee, fur was flying everywhere. There were a butt show too, I could see a butt while drinking my coffee, well, it was against the table at somepoint too...
*A cat would have allowed access to my bed. Now, unpopular opinion: My dog does not belong to my bed nor to my couch, only front paws allowed for her to look outside the windows. She has her own doggy bed.