It would be nice to have a configuration option that allows selecting automatic uppercasing (or lowercasing) of language elements such as keywords by language. For example, by convention xBase and SQL use uppercase keywords. Conversely, XHTML requires lowercase tags even though many of us oldtimers were used to writing HTML tags in uppercase. An option to have the editor automatically change the case for keywords for those languages as they are typed would be very convenient.
SlickEdit has this but it is specific to certain languages that they think may need it. Making it a generic option for any language would allow the most flexibility for users.