In particular for these linked discussions, ability to set explore/observation/identify filter defaults for multiple “Quality Grade” types (Casual, Needs ID, and/or Research Grade) would be helpful in a lot of contexts, and in particular to different identifiers with different identifying priorities. (Editorial aside – we should re-think the implied judgment in the term “quality” here…)
Also consider other filter defaults that could be helpful as sticky user account settings: Category(ies) (Plants, Insect, Birds, etc.); Captive/Cultivated (Yes, No, Any); Verifiable (Yes, No, Any); and Account Creation (Within 7 days, Older, Any).
Of course, these would only serve as initial filter defaults, changeable in each filter dialog, and changeable in the account settings as needed.