you can enter these with code (equivalent say to using a code macro in excel, - ie not a keysequence macro)
you CANNOT ever drag and drop data in access within a table (I dont think)
It is important to understand why. The point is that although an access datasheet resembles an excel spreadsheet - the real difference is that each row is COMPLETELY independent of all other rows. Autofill in excel works in excel by "knowing" that rows are ordered in a given way (and maintains that order as you process the spreadsheet).
Access is diametrically opposed to this, if you will. Every row stands on its own as far as the "dataset" of rows go, and access itself does not guarantee to present the rows in any order, although the user can stipulate a certain order. So every cell has to be filled indivdiually, although the cell can validate itself in respect of other cells.
That is why you can reorder and filter datasheets in access however you like without ever affecting the data. Because no data in a access table is dependent on other rows.
It may seem to be slightly less "friendly" in some ways, but it's much more powerful in general.