There aren't too many things in TAS that throw me.
- the inflatable Enterprise ("The Practical Joker")
- the oversized tribbles ("More Tribbles, More Troubles")
- the fifty foot Spock ("The Infinite Vulcan")
- the shrinking crew ("The Terratin Incident")
- the de-aging crew ("The Counter-Clock Incident")
They're brilliant ideas. I'd rather those than more "we've gone to planet X to mediate between two cultures..." stories.