My Pipedrive has to answer a lot of my questions, like "Who of my contacts tagged as "decision maker" in Singapore haven't I been in touch with for longer than 2 months?" Of course I can create a filter for that.
Creating a filter for every single question would clutter the filter list tremendously. That's why I would love to see a feature I call "Instant Filter" in Pipedrive: I can use the search bar to write a filter in a notation like in JIRA or Todoist. I can click "save as filter" if I want to - or not. That way I can quickly sift through my contacts, deals, activities, anything to find what I need.
For your reference:
JQL (Jira Query Language) - mighty but also complex: https://confluence.atlassian.com/jirasoftwareserver/advanced-searching-939938733.html
Todoist Filters - much less powerful but more straight forward: https://get.todoist.help/hc/en-us/articles/205248842-Filters