I'm a Principal at ThoughtWorks, classical composer, and physics amateur.
I'm looking forward to IntelliJ IDEA X (10), due real soon now. Typical of the incremental improvements every release has is How to Run a Single Inspection in IDEA X?.
I've been running the preview releases for a while now, and have noticed to my delight that version X is generally faster and lighter-weight than 9 or 8. Faster, better — what's not to like?