SHould I file a provisional application, or should I file a regular one?
The answer to your questions depends on various paramters including your budget, the stage you are in the proccess of devloping the invention and many more.
As a thumb rule we think it is always better to file a full application including all claims and embodiments.
It is extremley important to do so if you wish to file your application internationally too.
After you have a full application like we offer ou could file it as a provisional or regular with accordance to your preference.