Mr. Stripey is fun; it also goes by the name 'Tigerella' which I think describes it better. A yellow tomato striped with red, inside and out. Beefsteak-like, but some strains are a bit 'gnarly.' A nice slicer, but I've found it a little wet & sloppy for BLTs.
For BLTs I prefer a Seed Savers variety called 'Golden Sunray.' Nice & meaty and not too wet.