ticket to ride new york - do I have to pick destination cards?
You are never required to obtain additional destination tickets cards, even if you've completed the ones you have.

You have three options available to you:


You could claim a route. Remember, routes are worth points, and nothing prevents someone from claiming routes once their destination tickets have been completed.
You could pick new destination ticket cards. You might get lucky and get one or more that's already completed! If you don't think you're winning, this can be very effective.
If you're unable or unwilling to take the above actions, you can effectively "pass" by drawing more transportation cards.




While I used the terminology of New York in this answer, this answer applies to all of the following:


Ticket to Ride
Ticket to Ride: Asia
Ticket to Ride: Europe (You also have the option to build a train station.)
Ticket to Ride: Germany
Ticket to Ride: India
Ticket to Ride: New York
Ticket to Ride: Nordic Countries
Ticket to Ride: Pennsylvania
Ticket to Ride: Switzerland
Ticket to Ride: United Kingdom (You still have the option of buying a technology card before your normal action.)


I have no experience with the other Ticket to Ride titles.