Personally, one of the down sides of founding a company is that there is always too much work to do, and sadly I find I don't have much time to code any more.
I never struggled with trying to figure out what it was I wanted to do or what made the sparks go for me.
Some moments it feels longer, other moments it feels like it's flown by; you can't believe you've done it all that time... Overall, you have a strong sense for the full spectrum that you've sort of traveled.