I say whatever comes out first. Sometimes it's [i]Ee-ther[/i], sometimes [i]I-the[/i]r. Sometimes I say [i]Day-ta[/i], other times [i]Da-ta[/i]. Maybe I feel like saying [i]Care-ibbean[/i], or [i]Cuh-rib-bean[/i], or perhaps [i]Extra-ordinary[/i], or [i]Extror-dinary[/i]. But I always say Tomato, and Potato how it's meant. Just depends on what rolls off the tongue. I also treat [i]Neither[/i] like Ee-ther and I-ther.