There are many influencing factors to consider when choosing an ISP. Often, many of these factors don't come to you until you have used a service provider and inappropriately found them.
Firstly, one should think about the location of the preferred provider. Always try to choose a local company as you will have to call those numbers to get emails, etc. When looking for an ISP, you will find that prices may vary according to the services.
Small business ISPs tend to be popular because they often provide great customer service and relatively fast technical support. The cost-effective IT service providers in Miami are often very efficient and their services are very good. Small business ISPs are often very passionate about their business standards and services.
Large ISPs usually provide in-house technical support as well as many company services. Often, their ISPs don't offer the flexibility of smaller ISPs. Big ISPs usually have a lot of customers, so they are not as patient as small companies.
In general, one will have to find that personal ISP accounts are priced competitively, whereas business ISP accounts may be valued more highly than smaller businesses. Large companies have the latest technology equipment and usually offer faster internet connections.