I'm constantly impressed by people who have true, in-depth knowledge of any space.
If you're world class at HTML / CSS, know the specs intimately, know the differences and quirks in rendering engines and can explain why IE8 renders a selector differently -- that's impressive. That's also very valuable.
That wouldn't be considered real programming by a lot of folks. Who cares.
I've found that going broad is fun, going deep is hard. If you find yourself seeking challenges, there's often little need to branch out. If you dig deeper, you'll run into highly technical, hard problems really quickly. You also gain expertise few people have.
If you're world class at HTML / CSS, know the specs intimately, know the differences and quirks in rendering engines and can explain why IE8 renders a selector differently -- that's impressive. That's also very valuable.
That wouldn't be considered real programming by a lot of folks. Who cares.
I've found that going broad is fun, going deep is hard. If you find yourself seeking challenges, there's often little need to branch out. If you dig deeper, you'll run into highly technical, hard problems really quickly. You also gain expertise few people have.