One time RC always RC...
-the racing & excitement
-the fine mechanics
-the building & maintenance
-the modifications
-the learning & understanding
-the joy of masking & painting a cool bodyshell
-the trips & sights
-the new & friendly people
-building or improving a track
-taking part in organizing a race
-taking part in running a club
-maintaining & improving rules and regulations
And the fact that you're not ever going to have excess spare time and be bored again... and never running out of conversation...
Try always to have FUN!
PS. Never mention RC on the first date!!!