When generating a very basic report in Analytics, generating the report can take a very long time (last report I ran took longer than ten minutes, then encountered an error due to it taking too long).. Many times, I end up creating a smart list instead to get the numbers I need instead as I wait for the report to generate. However, when using smart list for reporting, I miss out on all the features that come with using analytics reports (scheduling, drill down, charts, etc).
Please improve the speed of the Analytics reports, I would love to be able to use them more often, but it's hard to rely on them if I can't get the data I need.