It depends on the gig. I'm a software engineer, I'm at my happiest and most productive when I have a user story and no interruptions. I'm also a senior dev and recently passed my 10,000 hours, I don't really benefit too much from close interaction with other devs on my team and their code will teach me anything they have to teach me. Thinking back to when I was fresh out of college, however, I benefited greatly from having a mentor who was close at hand for both coding and cultural learning.