I don’t either. I have a few I use fairly regularly but I change ‘em up. If my start word bombs, I use a completely different word with different vowels and consonants on the second row.
One of my friends who did the one row win doesn’t use a fixed start word either. She just lucked out that day.
That was an amazing stroke of luck!
Many mornings it comes down to: do I feel like an "O" & "I" day, or an "E" & "A" day...