This is a pathetic topic!
Then why did you post here? I don't think anybody participating in this topic cares what you think about it.
Now...as for it's "rollercoaster" overuse. I don't mind a bit when it's used appropriately. It is very descriptive for things like the stock market or marriage. Nothing else quite sums it up as nicely. Perhaps someone has a better way of describing something that goes up and down like that?
"Fluctuating" - not fun enough
"Reciprocating" - nah
"Rough and Tumble" - not smooth enough
"Bumpy, rocky, or rough" - not really descriptive enough. Perhaps "rocky" comes close, but not quite.
I can understand at something being overused, but I've never noticed it's overuse before.
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Decisions determine destiny; Destiny determines decisions.