Thanks again for the reply Le Taulier.
I just tested both "Ask for files" and "Get files" action. They both are very similar; when both is set not to select files, it seems to be doing the same thing?
I was thinking more like "droplet" workflow, where you can have "exe", of which selected files can be drag and drop into to do certain workflow actions. That would be very handy. The "wexe" does not allow for drag and drop.
But, I am interested with what "Get files" can do.
Say, if I have a specialized folder where I put bunch of files, probably with "Get Files" I could specify certain actions for those files.
I could think some kind of workflow like Belvedere (Lifehacker):http://lifehacker.com/341950/belvedere-automates-your-self+cleaning-pc
Actions is very interesting because it can do more, very flexible! Will brainstorm further.