One way to make your vehicle more distinctive is to eliminate your keyed ignition switch altogether, and use a simple start button to start your car. You can do this without compromising security by using an inexpensive keyless entry system to enable the start button for an time period adjustable up to 2 minutes. A WolstenTech Time-Delay Relay, connected between the keyless entry system and the start button, or to the ground side of the starting relay, will accomplish this feat.
Note that these diagrams don't account for ignition power, which would have to be controlled by a separate on-off switch.
Example 1: Timed Keyless Ignition using TDR-M
Example 2: Timed Keyless Ignition using TDR-PM