I had the honor of being owned by a Bichon for almost 15 years
They are a wonderful, devoted, very sweet natured, silly and loving little breed
I welcomed four more furries into our home after Bailey, and he got along with each one, was like a furry big brother.
The coat maintenance can be a struggle, they have a double coat, and mat very easily if you don't keep up with it daily. I kept him in full coat for about two years, but opted to just keep him clipped short with the head left in a Bichon style most the remainder of his life.
They are more prone to obesity problems. My Bailey was diabetic and on insulin for the last three years of his life. It is really important that they get regular exercise.
Good luck in your search!