I use Ortiz and Tonnino interchangeably.
This is one of my favorite ways to eat it, but more often than not I’ll mince some red onion and serrano (cilantro if I have it) and mix it in with black pepper and a good squeeze of lemon, then eat it with toast. If I’m doing this, I don’t drain it, the juices and olive oil just get mixed in.
Excellent just out of the can without anything added, though. Maybe just that squeeze of lime.
If you like sardines, the Ortiz sardines are really good too. Matiz as well.