First of all, congratulations on finding your way back after tendonitis etc--I bet it feels great to be playing again.
It's hard to give detailed feedback on these recordings, because of the sound quality. There are things I would like to hear done differently, but I can't tell whether it's your playing or the condition of the piano or the recording. I'd love to hear another recording of you playing them in better circumstances--these are some of my favourite pieces.
My impression of number 1 is that it needs finer control of voicing--a clearer distinction between melody and "accompaniment" (although nothing in Brahms is purely accompaniment--there is always meaning to every note--yet for the music to be intelligible some notes must be softer than others). For example, in bar 5, I want to know that the first note is sustained and belongs to a different voice than the other notes. In this recording it's not clear, for whatever reason.
In number 2 I don't get the feeling of "dolce"--but as I say, it could be just the recording. You need to make sure the repeated notes are softer than the main beats; it sounds a bit like the bar lines are in the wrong place. I confess that I didn't listen to the whole of number 2 or 3 as the sound quality was just too painful, sorry.
For number 3, the non legato articulation came as a shock to me! I'm used to hearing it done much more smoothly. I guess it's a legitimate interpretation of the "leggiero" instruction--possibly you could make it work. Certainly it's nice to hear a different approach. But at the moment it sounds a little noisy: you've got the "giocoso" part, but it needs more "grazioso". The parts where the melody is in the alto voice came out very clearly--good work here.
Sorry to sound so critical overall--but this may be useful to you if you're going to present these pieces in competition. And it's possible that you're doing beautiful expressive things with tone quality but we just can't hear them on this recording.
Are you planning to do the fourth piece of the set? I guess you need to be very sure that you're recovered from your injuries before you launch into that one!
...the last recordings you heard already posted on my profile on the main site...
As a new member of the site, I (probably) haven't heard those recordings--and I don't know how to find them based on your forum profile!
Anyway, thanks for posting the Brahms, it's always a pleasure to spend time thinking about such great music; don't let my little grumbles discourage you! I'll look forward to hearing the next version.