Chelsea have many clear rivals such as Manchester United, Liverpool, Leeds, Arsenal, Spurs etc. We even have a European rival in Barcelona, given our history. But when it comes to local rivalries, people might have different opinions on who is Chelsea's biggest "West-London rival".
The contenders: Fulham and Queens Park Rangers
Queens Park Rangers
Personally I dislike QPR more due to the recent events, but since they now are relegated(finally) we might or might not see a growing rivalry with Fulham.
Feel free to explain the reason for your choice in the comment section below.
UPDATE AND RESULT: As expected QPR is voted the most disliked "West London Rival" by you.The ones the voted for Fulham might be wondering "why?" Well if it's not already obvious; Fulham has never really been a big rival to Chelsea and thus there's no reason for Chelsea fans to dislike them. QPR is no threat to Chelsea either, but simply because of who they are and recent events we have reasons to dislike them. For now they are relegated, and perhaps when(if) they return, they could grow stronger because of their finances. Perhaps in the future QPR will not only be a noisy neighbour who's also the laughing stock, but rather a thorn in our side. I fear that could happen, and i'm positive i'm not alone.