Your comments

The default "NOT NULL" is becoming a real pain as 80% of the fields I enter are Nullable. So many times I create my tables and then when using them get a ton of "not null" errors.

Would it be possible to only make the following fields NOT NULL
- foreign keys created by the tool
- primary key fields
What about something as simple as setting the background of the entire model. This would be easiest to maintain as it is only one setting.