All,
I was working on a part the other day with some clearance and tapped holes and thought it would be great if one could use the same sketch for multiple hole types. Perhaps the hole feature dialogue box could have an "Apply" button, which would allow a user to consume of some of the center points of a sketch and then use a different hole type on another set of center points. Another thought that comes to my mind would be to utilize a similar approach as the "Fillet" tool, which allows for multiple selections during one session of the command (however, it may still be a good idea to keep the different hole types separate).
This is related to the accepted idea (US16145) and might be a good solution in general for all scenarios...
Link to related idea: http://forums.autodesk.com/t5/Inventor-IdeaStation/Need-ability-to-share-sketch-in-machining-environ...
Have a most blessed day!
Peace,
Pete