An important trait for for people interested in taking entrepreneurial avenues is persistence. Take this as a minicase study - p1 and p2 - coming from the Excite founders back in 1995. If you want to read the whole Sun story mentioned in part 2 read it from here.
Then read Marc's follow up from the VC's perspective: do you know when to stop?

Absolutely fabulous stories, Dragos, thanx for pointing them!