YOU ARE 28 UNITED STATES CODE SECTION 1332!
You are not a Federal Rule of Civil Procedure at all: you're the statute that allows the federal district courts to hear diversity of citizenship actions! You were drafted with the idea that an out-of-state party may be unduly prejudiced by appearing in a foreign state. Sometimes people may think that you're strange, and they try to minimalize your effects by requiring an amount in controversy and by being especially strict on the requirements for diversity. Also, attorneys often use you for "forum shopping" and other undesirable behavior. But there's no getting around the fact that you're so darned loveable! Your delightful quirkiness entertains friends and law professors alike, and although others may grumble about your eccentricities behind your back, they're always talking about you, so you must be doing something right. Let's face it, the world could use a few more 28 USC 1332's!