I like a wide range of body types. To me the contrast amplifies both. I like the character better when she's more unique in the setting instead of games with all the same body types. Those are kind of a turn off to me. Also oyakodon is it's own kink and a great one at that.
I definitely prefer loli to MILFs but sex is almost always good. Just like some people prefer light or dark skin, red/blonde/brunette hair, it's pretty normal, especially for guys, to enjoy variety.
Those are simply not mutually exclusive, espescially considering that "loli / Milf" are fairly loose terms nowadays.
A loli could portray simply a petite young woman, or straight up a toddler, the latter of which i find personally disgusting.
And espescially in Artwork/ 3D media such as VN´s its very subjective sometimes in how both of these are portrayed.
I mean we all played atleast one VN were the so called milf didn´t look like one at all except having a large ass and tiddies.