There are many matters to be considered when deciding whether directors should be paid by dividend or salary/bonus. In practice, a combination of each is usually an appropriate course.
Remember that dividends are usually payable to all shareholders. If you have outside shareholders who are not involved in the day to day running of the company then you will need to consider your dividend strategy carefully. Although it is possible for shareholders to waive their entitlement to dividends, this can result in tax complications, so a better option may be to have different classes of share, on which different rates of dividend can be paid. However, if this technique is used as part of a scheme to avoid tax or NICs for employees, it may not be effective and thus result in an even higher tax liability.
Finally, you may need to consider with us the effect that regular payment of dividends will have on the valuation of shares in your company.