Almost all the services offer some sort of page builder that makes it easy to drag and drop to build your page. These are great for getting started, but they often lock you into the service. Most page builders are proprietary to the service, or don't create HTML that's portable enough to be easily moved to another service if you decide it's necessary.
Traditionally, Windows-based hosting costs more money than Linux hosting as a result of the licensing fees assessed by Microsoft (Linux is open source and therefore free to use). However, this is less true today. Some companies, like 1&1 and GoDaddy offer hosting packages that cost the about same, regardless of which operating system you choose to run.
It is important to remember that when you sign up with a web hosting company, you are not just purchasing a set of technologies. You are also entering into a business relationship. There are many non-tech reasons why you might choose one host over another. You need to be able to trust your hosting company. This is where customer reviews can be very useful.
Many services offer so-called unlimited or unmetered service for whatever amount of bandwidth, disk storage and sites you use. It's important to understand that most terms of service actually do limit the definition of "unlimited" to what's considered reasonable use. The bottom line is simple: if you're building a pretty basic website, unlimited means you don't need to worry. But if you're trying to do something excessive (or illegal, immoral or fattening), the fine print in the terms of service will trigger, and you'll either be asked to spend more or go elsewhere.