Location/Monitor "Profiles"

Allow defining a "Location Profile" that is shared at account level. This would allow picking a set of probe locations once, and then 'selecting the profile' on each of the checks. Individual checks should allow (use profile, override profile, append to profile) options where applicable. 
 
If you wanted to take this one step further - I'd make it a 'Monitor Profile' and include other elements - schedule, frequency, retries, alert settings, etc. All with the same (use,ovveride,append) variations. 
 
You already 'sortof' have this with the 'Alert Settings', but you only have the choice of 'global' or 'specific'.