Learn Russian: В наш магазин приходят всякие клиенты. - All sorts of customers come to our store.

In Russian, the most important new information (the focus of the sentence) usually goes at the end. By placing всякие клиенты last, the speaker emphasizes who is coming to the store (all sorts of people!), rather than the mere fact that people enter it.

What is the exact nuance of всякие here, and how does it differ from разные?

Всякие means 'all sorts of' or 'any kind of', and in everyday speech it often carries a slight emotional undertone—implying that the customers can be unpredictable, unusual, or demanding. Разные is a much more neutral way to say 'various' or 'different'.

Why use the prefixed verb приходят instead of the basic motion verb ходят?

Приходить is an imperfective verb of motion that focuses specifically on the arrival at a destination. Using приходят emphasizes the customers showing up or appearing in the store. Using ходят would focus more on the general habit of going, like 'they frequent our store'.

As a quick refresher, why is it в наш магазин (accusative) rather than в нашем магазине (prepositional)?

With verbs of motion like приходить, the preposition в indicates destination or direction ('where to?') and requires the accusative case. The prepositional case would be used for static locations ('where at?'), such as describing customers who are already standing inside the store.