Can I get a straight profile with a supratip break?

It's one of the nuances to rhinoplasty.  Leaving a hint of a supra tip dip to accent the feminine tip.  I avoid it like the plague on men.  But on women, a perfectly straight profile can look a little to strong, unless the face is long and the patient is tall.  Supra tip dips are easy to fill afterwards, if you don't like yours so it's no harm-no foul going for a nice supra tip dip with your rhinoplasty.

It is often aesthetic to have a slight supratip break especially in females, but that is up for discussion with the patient in conjunction with an experienced rhinoplasty surgeon. Often, I do not make a significant supratip break, in a male rhinoplasty patient.

An absolutely straight nasal profile is often felt by patients (and doctors) to be an unnatural "operated-on" look. The slight upward tilt of the nasal tip from an otherwise straight nasal profile is created surgically where one is not present to give a more natural, un-operated tip appearance. Some men are OK with a straight nasal profile, but most women (and some men) prefer a more refined, elegant look with a slight "break" in the straight line. The ideal "break" is very subtle, IMHO.

A "scoop" or curve to the nasal profile is generally a sign of over-resection of the nasal hump, and can give an unnatural "ski jump"  type nasal appearance. This is not a good look, and the tiny overdone nose went "out" in the 60's!

It sounds like you have the right idea about the STB point.  It will make your nose look a bit more feminine in addition to the concepts that you've understood.  In order to create it we need to surgically raise the tip of the nose over the dorsum, so it is quite a different concept in answer to your question about a slope nose.  Good luck.

The supratip break is a 1 or 2 mm deep concave area just above the tip of the nose that is mostly visible on a side view. In the absence of this break we say there is a supratip deformity. The reason for trying to place it there is to make the result of surgery more natural in appearance so the nose does not look operated on. This is very different from a ski slope deformity in terms of depth and length of the concave area on the bridge. The treatment of ski slopes is to place a graft on the bridge of the nose.

The supra-tip break in rhinoplasty refers to a slight projection of the tip above the bridge on profile. The bridge will be straight or neutral, slightly curved, or even have a small hump remaining and still allow a supra-tip break. The slight projection of the tip above is considered the aesthetic 'standard' when judging a good result, but the look can appeal to some and not others as there is no 'right' result in nose surgery, only one that suits your features and goals.
Best of luck,
peterejohnsonmd