It sounds like you have a good handle on things.
I am sorry if I assumed anything in my first reply that is not true.
If your drama and other behaviors are not causing you a lot of problems socially besides the occasional comment or two, then I do not see a major problem with it at all.
If you are able to control it depending on whom is around you, that is great skill to have.
You are right, that talking to someone who will listen is very healthy.
And hopefully you are able to be there for your friends too.
I so wish I was able to do that.
Temper-tantrums and such behavior might not be the most socially acceptable way of venting emotion, but it is definitely OK to be a little dramatic every now and again.
And if you are an actor it probably is even handier