How can I use these new findings on tomatoes to my advantage?
Picking a tomato which is individually ugly isn't going to help you.  It's still the same variety and grown, stored and shipped under the same conditions as the other tomatoes in the pile.

Try looking for a store (farmers' and ethnic markets are good for this) which has a whole bin of ugly tomatoes; those are a different variety and/or handled differently.  Heck, here in California, there's even a hybrid brand which is marketed under the name "Uglyripe", which is quite tasty.

Also, just "ugly" isn't a sufficient description.  What you're looking for is irregularities in color, shape and size.  Bruising, blemishes, wormholes and brown streaks don't indicate a better-tasting tomato, just one which has been abused.