Having two for us made our lives easier. Chip was constantly demanding (yes, demanding) our attention. We couldn't even sit down for five seconds without having him getting into something or wanting to play or dropping a toy or throwing a fit, etc. We got Smokey by chance... we weren't looking really. My friend's mom called me and said her friend had a yorkie that desperately needed a home and I went to pick him up the next day, but anyways, having Smokey around allowed both of them to play together rather than Chip just always wanting us, which in turn tired them out more and there was more quiet and peace in the house. Of course, which two, there is a lot more noise during play time too.
Seriously, I love having two dogs. It does take some adjustment initially and there can be some jealousy issues at first that need to be worked through with the dogs, but all in all, I'd recommend it.