Do what you’re good at. It’s great if you can be dedicated and devote the time to learn something that comes difficult to you, but the rest of the world will be speeding by during your struggle. There will forever be someone who can pick up in a day what took you weeks to master. This adds to the concern of job stability if you are unable to stay on top of evolving technology as quickly as competing candidates. The one exception to this rule would be if you absolutely love what you are learning and are willing to put in (lots of) extra time and work longer to make up the difference. The key: find what comes natural to you and use it as a springboard to propel your profession.