I would like to do a cool monogram or just something cool with the initals "DT" or just "D." Keep it simple yet eye catching. Strong, modern, bold, creative, simple. Silver, dark greys, and slate blue.
If you use fonts that require a license, confirm with the client they're ok with it. For licensing reasons, it is better to provide your client with information on how to acquire the font rather than providing the actual files.