They're both excellent judges in non-ideological cases, and many of Sotomayor's majority judgements read well and she's clearly very on-the-ball in orals. It's a shame in these cases -- I think Sotomayor is more of an ideologue than Thomas.
It's important to read his stuff too because it seems to gain more acceptance as time goes on.
Your points on Sotomayor are well taken, her dissents are often way over the top. However I'm starting to think Justice Jackson is potentially worse when it comes to histrionics