Most people seem to prefer the Canadian side of the Niagara Falls, I actually preferred the US side. The Canadian side was a bit too commercial with a carnival feel while the US side seemed more focused on the nature and parklike atmosphere.  While there, I stayed at the Seneca Niagara Resort & Casino with a corner room and would highly recommend it. The room was extremely spacious, floor to ceiling windows which provided a great view and probably the biggest hotel bathroom I have ever seen.  There was even a huge free standing Jacuzzi soaking tub in the corner of the room so you could enjoy a nice bath and a great view at the same time.