Should my teeth be slightly flared out as opposed to inward? (Photo)

While teeth can flare out naturally, they don't always.  The photo you shared looks within normal limits and I would not be concerned.  It may feel a bit odd if this is much different than how they have been previously, but you should adapt easily.

Thank you for your question.
There is a whole spectrum of flaring of your teeth that is possible and also justifiable in terms of the look that you are going for.
As the veneers that you have in the photo may be transitional veneers, you need to ask your clinician how closely they resemble your final - definitive veneers. If they are very similar and you do not like these, then the same will likely apply to the final veneers.
You are the best judge if the amount of flare is right - you are also the person who has to speak out and express yourself if you are not completely happy.
Good luck and best wishes

Thomas Dey, BDS, MSc 

Hi:There is a slight outward flare to the front teeth normally.  If the front teeth are inward you will lose lip support.Best,Dr. Maddahi