I consider D3 a rather low level solution for data visualization. It gives you the bits and pieces for making paths, axises, and svg's that users can interact with.

If you just want a simple, good looking line chart with legends and tool tips, you're better off using a library like MetricsGraphs, highcharts (not based on d3), or nvd3.

If making custom, unique visualizations is your day job, then d3 is the right way to go.