I am with you completely on wearing what I love most the most often and the stuff I love most is almost always new. If it isn't new, it's a formerly almost-orphaned item that suddenly takes on new personality when paired with the shiny new fun thing.
I think in the end I like to have 2 or 3 choices for each activity each season, and I will happily repeat those outfits again and again. My Distillery district outfit is a key example of that. I've worn the exact same combination at least four times in a month and would happily wear it at least that many times again should the occasion fit.
At the same time, I really really really prefer that there be NEW items in these outfits. In that case, the top and shoes and earrings are new, the skirt and bag and cuff are old. Without the new, I probably wouldn't feel as fab.
I think maybe we are similar that way, so the start of a new season is super exciting.
It's also important when you do so much travelling to know your "ducks are in a row" so to speak, so I understand where you're coming from on that front as well. Sometimes you shop when you're able because you know the spare time might not be there later on. And also if you have a new and potentially big client -- well -- you want to look your best.
Would it be overkill to look at Boden's offerings?
50% is more turnover than in my closet but I think you keep your closet leaner than I do. My numbers have crept up to around 130 items across all seasons, counting coats, shoes, boots, and bags but not scarves, jewellery, undies, gear.