I don't want them bigger than 180, personally. I think what ends up being the consensus recommendation for these things is a nakiri that's designed with western consumers in mind, when the basic nakiri is the most common kitchen knife in Japan (or at least it has/had been). I really like one made with the japanese consumer in mind, in the 165 x 50+, range for most of my produce cutting. Since they're so common, there's a ton of variation in stock thickness, grinds, etc. You can get knives made with a silly thin hagane that are as pure a laser as you can find (and they're very bendy). You can get knives with a very pronounced hollow hira and low wide bevel with a pronounced shoulder, you can get them ground more thinly at the heel and tip than in the middle. I like the hollow hira/low wide bevel ones best for general use, especially the ones with a thicker grind in the middle than the tip and heel. I like the bendy lasers for tall/dense stuff, and I like the big 180+ ones that are common kkf recommendations for bigger bulk prep, and bunches of greens.