After choosing one look and feel(L&F) from Options-->Look and Feel-->(windows or anything), this L&F is not persistent between restarts, once I close JMeter look and feel resets to default (Metal), every time I have to set my favorite L&F after JMeter started. Users preference on L&F must be stored, and that should be persistent between restarts.
This works like language and is persisted in jmeter.properties.
Actually, it is now persisted *** This bug has been marked as a duplicate of bug 52037 ***
This issue has been migrated to GitHub: https://github.com/apache/jmeter/issues/2662