I know I'm a bit late on this thread, I admire your resolve Mykl. If that's waht you like then go for it, but you've got great advice in this thread. As Ed said, Don't get the 'Stockholm syndrome'.
I'm not saying drop the niche altogether, I'm saying use Market Samurai to tweak it. There may be longer keywords to your niche that are highly profitable. Filter your search for ulra high OCI (maybe 80% and up), then do your other filters for SEOT and SEOC etc.
At least that way you know beforehand, your keyword results have sales potential, then structure your efforts around those.
I haven't checked but "Love quotes" may have a high OCI compared to "Relationship quotes" as a gift (Valentines, Anniversary, Plain Love gift).
My fiancee had bought me a book on 'Shakespeare on Love' giftbook with quotes. It was a gesture of love, which is easier to sell than relationship quotes.
Just my late two cents.
NB. If you don't have Market Samurai, you can use the following link to check online commercial intention
Detecting Online Commercial Intention: Audience Intelligence: adCenter Labs