I advise students to play main lines and once I have explained why they are normally happy to do so.Richard James wrote: I'm sure you're right, Paul, at all levels. Watching the games in the Minor section of the Richmond Rapidplays, I notice small children of about 50-75 strength playing the Colle with White and the Caro-Kann or Scandinavian with Black. These are not openings you'd come up with without tuition: they have clearly been advised by well-meaning chess tutors to play 'safe' openings to avoid losing quickly by making tactical oversights.
For those showing flair at endings then the Caro is a good choice IMHO.
I am confident that this is good advise for ambitious players especially juniors.
If the player is an adult late learner then I would make an assesment based on their attitude an attempt to provide appropriate advice.