I can guarantee you that your WoH confidential customer profile contains far more information about your tastes than you actually might feel comfortable with. Mine apparently says that bananas are my preferred fruit.

What I wouldn't want my WoH profile to say is "a real pain in the a$$ about welcome amenities. Always bugging us to get something special. Apparently on 20th honeymoon / birthday /anniversary getaway this year"

The best tip I can give you is to NOT deal with your Concierge, but instead check into hotels after 5-6pm, when management has had time to prepare your room for you. (including having it cleaned after the prior night's guest checks out) The best way to have an amenity never arrive is to check-in too early and be assigned a random room by the front desk. At busy hotels, the guest who received your preassigned (and therefore reassigned) room is often the one who got your chocolates...

Welcome amenities are a hotel-specific initiative. Just because Hotel A gives you a bottle of wine doesn't mean that Hotel B should give you one. If you want something specific, then arrange with your Concierge to have it waiting, but added to your hotel bill...