Vanessa:
Her jCD is very effective and has great reach.
Her dfB is a great sweep and has great range. More inportantly, it can be comboed and doesn't lose its sweep ability in the process.
Her fA is an excellent overhead. Its very decieving and has great priority. You know how you run up to someone to attack and their wake up move is a DM? This move would either win (usually) or exchange hits, never connect (of all the times I've used it and I use it often).
Her QCB+P dodge is great for high attacks. If someone does a jD on you, the initial doge would dodge that and you can follow that up. Quite safe.
HCF+P is great and very damaging, especially in combos. Great tick damage too. Don't forget to tap punch, there will be more hits.
Her QCF or QCB+K are great dodges and the A version follow-up can followed up with the QCF QCF+P DM. (Charge) B+F+A can also be followed up with the same DM. Whats great is the DM is a juggle, not a supercancel.
Her QCB QCF+P DM has great priority and has a SDM version. Eventhough it looks like her teleport move, it (unlike them) does not go under fireballs.
DP+A is good for combos, eats up firballs and can be followed up in the corner with QCF QCF+P DM or another normal move. DP+C can be super cancled and from what I hear can deflect firballs. Can be used as an anti-air as well.
QCF QCF+P DM needs to be blocked high (very decieving) and can be used as an ant-air.