Banter: S35VN is a good steel (also available as an exclusive in 20CV, which is top-tier); meets length requirement; not particularly fun, thumbstuds and limited lock access make it less enjoyable to open/close; very non-threatening (except maybe all-black versions)
Para3: S30V is a good steel (also available in an array of other steels); right at 3"; compression lock and Spydie hole make for a fun knife; kinda "stabby" but not overly tactical (depends on color)
Chapparal: XHP is a good steel; meets length requirement; Spyderco back locks are not "fun" (Raffir is nice to look at, though); non-threatening
MiniBugout: S30V is a good steel; meets length requirement; Axis Lock knives are very fun; non-threatening design (again, depends on color - orange/satin plays with non-knife-people very differently from black/DLC)
Pintail: S35VN is a good steel; right at 3"; WE makes great flippers; kinda "stabby" but not overly tactical (depends on color)
Of the options, the Banter and the Pintail are the most likely to be well-made (WE does a much better job than Spyderco's Golden and Seki factories or Benchmade). As you'll hear a lot, the Bugout (including Mini) doesn't "feel" like a $120ish knife.
Lastly, the S35VN/Micarta Elementum is back in stock at BHQ, and has all the good things about the Pintail, in a definitively sub-3" package with a more lunchroom-friendly design. And it costs less than any of the options listed.