As an experienced professional in algorithms, software development, and machine learning using Python, I'm confident that my skills match your data analysis needs. Throughout my career, I've completed multiple projects leveraging advanced Excel skills - such as VBA - to extract valuable insights from complex datasets like yours at BeerMart. With this proficiency, I will efficiently handle your data preparation, exploration, and the building of recommendation models you require.
Furthermore, using Python alongside with Excel enable me to automate data processing tasks, improving overall efficiency and accuracy. Combining this with my experience in EDA (Exploratory Data Analysis), I guarantee reliable identification of the appropriate values for N to maximize the effectiveness of your recommendation system.
Lastly, concerning your task for visualizing average ratings per user/beer and determining similarity between them, rest assured that I am highly conversant with appropriate visualization tools like Matplotlib and Seaborn. Equipped with these skills and my past experiences on similar projects, I can effectively showcase the desired comparisons and provide a comprehensive evaluation of each model's performance using infographic-like visuals. Let's collaborate to help BeerMart pour its success!