It implies:
* Freedom of choice: You have the power to decide without being influenced or forced.
* Desire fulfillment: You get to have your preferred outcome, whatever that may be.
* Ideal scenario: You're in a situation where you can have things exactly as you would like them.
Example:
"If I had my druthers, I'd spend all day reading in the park."
This means the speaker would prefer to spend the day reading in the park rather than doing anything else.
In short, "having your druthers" means getting to have it your way.