Hi Albert,
After SGEN, as mentioned above, what else do you want to do? The support packages are there to (a) fix known issues, and (b) can include new or extra functionality. Unless you are particularly looking to use the new functionality, then just continue as you were before.
If this is part of a landscape which is productive, then your testing team will want to run through their regression tests in DEV or QAS to ensure that the key business processes still work as before. Once they have signed things off then you are free to roll the patches through the landscape to Prod.
regards,
Graham