How do you model - lots of features or complex sketches?

Hello

I am sure some parts, like a complex casting, require several feature but what about parts that are flat that could be made with one massive sketch and a single extrude? or do you like more features like fillets, extrude cuts, hole wizard?. Is it better for the cpu to process the massive sketch or the features? What about when these parts go to an assembly? Does one modeling style lend itself to improved cpu usage in assemblies and fater rebuilds? I wondered about this and after writing it out I guess it could be tested with a simple assembly...

SolidworksParts And Features