But does Medtner ramble? It seems his form / structure could be better thought-through at times. This is a general overall impression from the sonatas and concertos. I think his best concerto is the 3rd.
I love the texture of this piano writing.
I've listened to the skazi the most - great pieces, if I were going to start anywhere with Medtner it would be in the some of the easier skazi.
The skazki are definitely a good place to start with Medtner. (Although in my case, I started with the sonatas, and that's how I became hooked. But I'm just sonata-obsessed, and for whatever reason, I've never been particularly attracted to smaller forms like character pieces.)
I don't know, to me his sonatas seem pretty tight and logical in their form and development. Especially the short sonatas of Op. 11 which I'm learning, but even in his longer ones.
The only sonata that I could see being critiqued as "rambling" is the Night Wind, but that is more focused on embodying the Tyutchev poem that serves as its epigraph, and thus it has a quasi-programmatic/poetic element to its structure which adds a certain level of coherence to the whole. Also, even there in the Night Wind, the first section is pretty recognizable as sonata form I'd say, at least with a few listens. Its the second section, the fantasy, where the "rambling" might seem to come into play.
I agree that the 3rd concerto is his greatest, although I think the 2nd has the clearest form. To me, the 3rd could actually seem rambling if it weren't for, again, the programmatic element (Rusalka).