I've got the life, thank you.
Avoiding the lines at check in will always be worth whatever it takes to be elite.
Pre-boarding is always a plus. Again, worth whatever it takes.
But the biggest reason is the 100% mileage bonus. My miles are all redeemed for International First Class travel. It was cool to be Gold, but Platinum rules.
As an elite, you are treated better. The dedicated numbers for the service desks are a plus.
Oh, did I mention it is nice to have one's ego massaged.