Nice study, thank you!
I have tried MO, GP, and Optic and agree with many of your impressions. I know a lot of people use MO in virtually all of their beers, but I can't get past its "nutty" character in hoppy beers. I think MO works great in English styles, stouts, etc., or when mixed with another, more neutral malt like American 2-row/pale ale.
Agree that GP is a very sweet malt. I used it in a N. English brown ale, American stout, Wee Heavy, and RIS. The sweetness is very evident. So evident that some have mistaken my American-style stout for a sweet stout (with 70+ IBU's and a pound of roasted barley!). The Wee Heavy is also a bit too sweet even though it fits all the BJCP style parameters. Optic I found to be pretty neutral.
I have tried MO, GP, and Optic and agree with many of your impressions. I know a lot of people use MO in virtually all of their beers, but I can't get past its "nutty" character in hoppy beers. I think MO works great in English styles, stouts, etc., or when mixed with another, more neutral malt like American 2-row/pale ale.
Agree that GP is a very sweet malt. I used it in a N. English brown ale, American stout, Wee Heavy, and RIS. The sweetness is very evident. So evident that some have mistaken my American-style stout for a sweet stout (with 70+ IBU's and a pound of roasted barley!). The Wee Heavy is also a bit too sweet even though it fits all the BJCP style parameters. Optic I found to be pretty neutral.