One feature I like about site5 hosting is the multisite accounts. It is basically a full featured control panel for each domain. Unlike other Shared Web Hosting U companies which uses domain pointers, a multisite accounts exists on its own with its own subdomains, domain pointer, ftp, mysql etc. This help me to organize my websites better especially if you have a lot of domains. You can set the diskspace and bandwidth from the main pool of your web hosting account.
Mailing List - A convenient way of emailing an entire batch of email addresses - staff list; subscribers' list etc. Check how many mailing lists your package will allow.
Just because you have used Affordable Web Hosting doesn't mean it has to be poor quality hosting. There are lots of very good quality hosts available at very affordable prices. Also be aware of what comes as standard with your hosting and what comes as paid extras. Check that your potential host uses a popular control panel such as Cpanel. Some hosts use free panels and although they work fine, if the time comes when you have to move your website to a new host, control panels like Cpanel make the process a lot easier.
If you are planning to put up more websites, then it will be helpful to have the 'addon domains' feature. This will enable you to host multiple websites on one web hosting account without the need to incur additional costs.
Get into Shared Web Hosting UK 2.0 (aka Social Networking)! Start a blog (you are reading an example), post a video on YouTube, set up a company page on Facebook, post press releases online, write and post articles about your area of expertise...The possibilities are growing all the time and the more work you put in the better the results you will achieve. Don't forget to link everything back to your site!!
Will they hold your domain to ransom when you come to transfer away? Can you be in full control of your domain at all times? Is the company just another reseller of a reseller of a reseller?!
Finally, when you choose a host - always think that it is the best friend of your site. When you make a friend in real life you always consider lot of things before choosing and also overlook minor mistakes to keep a long term relation. A web host is a real friend for you as it provides your business keep running online 24 hours a day and 365 days a year.