When I first started working as a computer trainer most experienced secretaries were WordPerfect experts, Lotus 123 was the spreadsheet of choice, and those who were using Windows were mostly using v3. However, Word and Excel were becoming popular and employers were beginning to demand the relevant skills.
I did quite a lot of training, mostly Windows, Word and Excel and usually either for individuals on a one-to-one basis or groups of 2 or 3 for small businesses. It was round about this time that I started creating databases (Access), automating both Word and Excel and creating Word templates.
In recent years most of the training I've done has either been ad hoc (question and answer sessions which fill in the gaps left by class-room or computer-aided training) or sessions which focus on advanced features. Sometimes I'm providing support for older people who find other types of training are either at too fast a pace or lack the individual support they need. The pattern of requests has changed over the years, with help for using scanners, digital cameras, email and internet featuring much more than it did in 1995.
I find my clients enjoy their training sessions and find them beneficial. Once they get beyond a certain point they can find out most of what they need without further help from me (I offer telephone/email support for the odd occasions when clients need a little extra help). However that's not to say that more experienced users can't learn a thing or two to their advantage - there's always something worthwhile to learn!