Same for myself and Clojure. Better coding productivity, easy Java interop for more libraries, and the deployment story is a no-brainer.

Me too. What I like about Clojure (and other JVM languages) is that I can choose how much I want to take part in the JVM ecosystem. There is usually a spectrum from pure-clojure <---> clojure-wrapping-java <--> pure java and I get to choose where on that spectrum I want to or need to be based on the needs of my project.

Since the Java ecosystem is huge, this gives me a lot of confidence that most of my needs will be met by existing tools.

I haven't done much with the other JVM languages except play around with them (did work with a small jython project about 10 years ago...). Have you encountered any impedance mismatch? Or weird cross language bugs?

JRuby converts values (Java primitives <-> ruby Numeric, java.lang.String <-> ruby String, etc.) sometimes with unexpected results.

JRuby does not wrap primitive values, or provide values that behave like primitives, but you can add that: https://rubygems.org/gems/infraruby-java