I miss a lot of modifiers to be completely comfortable with this set, otherwise it's very nice. Maybe you are willing to add:
1u: ctrl x 2 / alt x 2 / fn x 2 / shift / backspace
1.25u: fn x 2
1.50u: fn x 2 / backspace
1.75u: fn / shift
but I'm pretty sure I'd be alone getting them
Matt3o, can you please 'splain what they are all for?
surething
1u CTRL and ALT are mainly for custom keyboards and also 75% layouts (such as keycool 84)
1u FN is useful on a variety of scenarios, eg: to the right of the right shift in 60% layouts, in winkeyless if you want to add an FN layer.
1u SHIFT is just for custom 60% (but the minila has 1u shift for example)
1u BACKSPACE is again for custom keyboards (you way want to try a 14-cols layout sooner or later)
1.25u FN, well it's an all-around FN keycap size. Any 60% has at least 1, I'd add 2 just because I like function layers.
1.50u FN same as above if you prefer 1.5 modifiers but 1 is more than enough
1.50u BACKSPACE is for HHKB-like layouts or if you want to switch \| with backspace
1.75u SHIFT is for HHKB-like and PURE-like layouts (pretty common actually, I think this should end up in the main set)
1.75u FN is to swap capslock with FN (aka one of the best spot for FN)