This is my perspective, and it won't match everyone's so keep that in mind, peanut gallery.
I have never been to the same place two years in a row. I would be bored to tears if I had to do that. Here are 5 years for me (and the cost):
2013 - Myrtle Beach, SC (~ $2,500 including oceanfront condo)
2014 - WDW (~$4,500 because we went during spring break like idiots)
2015 - Outer Banks, NC (~ $2,500 including a deep sea fishing trip - highly recommend!)
2016 - Orlando "Dark Side" (expecting ~$4,000 since we want to fly 1st class just once)
2017 - tropical cruise (no clue on this one; never cruised before)
I'm hoping for a trip to Hawaii one year. DD graduates in 2023, so maybe we can make that trip happen for her graduation gift.
I have friends that have gone to the same beach for 10+ years. I have friends that go to WDW every year for 10+ years. Same with the mountains (why anyone would want to spend a week on a tree-covered rock is beyond me

). One thing I've noticed with almost all of them is that the 'magic' of the trip is gone. They no longer notice the big things and nitpick the little things. I think it's sad. If the big magic has stopped for you, then you should definitely go do something else.
Don't be afraid to try something new!