I wouldn't say so.
I had a trip in Nov, have another in Feb and a longer family trip in July. I also hope to visit either Anaheim or WDW in Spring (around April) as I'm going to be out in the US for work and I also wouldn't rule out another trip beyond July to DLP.
I know most people would get bored doing the parks so much, but I've been travelling back and forth regularly since my teens and I'm now 30 and I NEVER get bored...I just love it.
So I think it's about you. If you can spare the cash and you love it, then why not?!