$100k I would be more relaxed, pay off everything except the house to lower monthly cost and try to find something perfect, that provided enough to live on.
$1M, I would retire, probably, or work part time, not worry about making enough to live on.
$10M, I would absolutely start a business, profit sharing co-op.
$100M, I would set up an endowment for charity for those in my city and probably sell my house and just travel.