The term "soft" basically means slightly out of focus. Were you shooting in manual for these? If you could let us know what your aperture, shutter speed and ISO were that would help in letting you know what to change for next time.
I really like these though! Your composition is very imaginative and the colors are great! The only thing I don't like is the color of the girl with the dark brown hair's lipstick..it just doesn't fit with the feel of the shoot. You haven't specified if you mind if others play with your photos a bit to give you some different ideas for post processing..so I hope you don't mind that I played with a couple just to give you an idea of how they would look with a little bit of a color pop and some minor enhancements. I can take them down if you'd like!
they all look out of focus to me, maybe they need to be sharpened??? i like the comp & attitude in #1...love the light in the jump shot, but her expression and hand positions are odd...
i like the first lights colour rendition on #1
Fantastic shots. You have a real talent that can only improve.
I do think they are 'soft' but IMHO a portrait should be a little soft. However, you do need the eyes and mouth to be sharp so a little selective sharpening might help. Just my view but I think 'firstLights' edit is a little too harsh. (don't shout at me...It's JMO)