Apart from the masochistic desire for the 90, which, I am currently v down about, you could argue I have very few diversified interests.
Sure, I dabble on shares, and other general gambling themes, but, I maybe dont do as much basic research as maybe I should, in other areas.
Its not that I am lazy - cricket provides a ROI, unheard of, for Poker/AP's (Advantage players-AKA card counters), and its enough .. but, have been diversifying my listening portfolio, and came across a v interesting radio podcast in Las Vegas, called Gambling with an Edge - https://www.bobdancer.com/radio.cfm , and after listening to a dozen or so more, did some more reading.
Via the Las Vegas Advisors website, http://www.lasvegasadvisor.com/ , I found more of Bob Dancers writing, and its fascinating stuff.
'Bob Dancer' - I am not sure if thats his real name, is a video poker expert .. playing high value slots, when the pay table, pays over 99% or so, which, combined with comps, will make him a small favourite.
His due dilligence, in researching spots, is amazing ..
Its possible you can argue, he is a one-trick pony, being an expert in Video Poker, (thou I somehow doubt it), and it shows u, just how hard you have to work, to find edges, and maintain/exploit them.