23 years old: I have very very triangular shaped breasts. Are they tuberous and would an augmentation solve the shape? (Photo)

Far more important than the technique is the skill and experience of your plastic surgeon. Choose your surgeon rather than the technique and let them explain why one technique may be better than another.  See the below link on some suggestions on finding the most qualified Plastic Surgeon for a Breast Augmentation.  Always insist on a board certified plastic surgeon.

You appear to have constricted breast anatomy - the solution is generally an aggressive dual-plane augmentation with scoring and release of the lower pole breast tissue. I've developed a preference for form-stable implants in these case - they are stiffer than round gel implants and impart some shape to the lower pole, less volume to upper pole of breast. Check out the link below for an example.

Yes, it does appear as though you have a mild form of tuberous breasts. This is something that can certainly be corrected during an augmentation as long as your surgeon recognizes it and releases the constricted areas appropriately. Meet with a few board-certified plastic surgeons in your area until you feel comfortable that one can do the job that you want. Best of Luck!