if you want Ajijic the Hotel Nueva Posada is nice. Close to everything. Michael the owner is a great guy and his mother Judy is a delight. I met someone new each day I was there.
If you don't mind being away from Ajijic the Villa Paraiso air BnB in Riberas is a good choice. Kitchenette, swimming pool, studio apartments.
As for there being too many people, that's the case everywhere. It does not diminish the beauty of Lakeside. Most of the people you meet here are very nice folks that you will enjoy spending time with.