My OH is the opposite. Spends so much time planning and prepping, worrying about possible future events, etc. I'd love him to be more laid back and go with the flow a bit.
He drives me mad with his paranoia about all the "what ifs". Latest was when we were redecorating and refurbishing our lounge. He had Plan A and Plan B (and probably a Plan C) for every little thing, every contingency. He bought huge amounts of stuff we didn't need because he wanted it "just in case", so several different fillers, loads of different sized paint brushes, rollers and trays, 2 or 3 different styles of electrical switches and sockets, even two complete sets of wallpapers of different batch numbers in case the first batch turned out too light or too dark. He also spent weeks poring over paint colour books, bought about 20 sample pots, etc to get exactly the right colour/shade of paint - I'd have just gone in and bought the first "beige" I could see - I never realised there were so many shades of beige!
Also, paranoia about whether the old sofas could be got out of the door (we'd had new doors and tight front porch fitted) and whether the new sofas would get in - he'd measured all dimensions on new and old sofa, drawn scale drawings of the front porch and worked out angles etc to prove to himself they'd all get through and even showed them to the delivery drivers to "tell" them the best way to get them through. Of course, the drivers just picked them up, and used brute force to get them through without all the twisting and turning that OH had carefully planned!
Even "household" things, he's a nightmare. He'll write things on the shopping list that we really, really, don't need yet, i.e. as soon as he opens a new butter, he'll put it on the list, same with milk, bread, cornflake packets, etc - I have to "revise" his lists to remove loads of things that I know we don't need "yet" and put them on the next weeks' list instead! Long before covid, he wanted a "store" of food and household items like loo rolls "just in case", so we always have several weeks' supply of household stuff and tinned/packet foods. At least it was handy at the start of covid with the shortages!
As for clothes, well that's another story. He plans out what he's going to wear all week, for every occasion, including wearing, say, a works shirt for two days if he knows he's only going to wear it for one morning and one afternoon - rather than going in the wash on the morning day, he puts it aside for the afternoon day.
Holidays are another nightmare. He has each day planned in advance, including mileages/directions etc all loaded onto his phone directions app. He makes a list of postcodes for all local "amenities" including supermarkets, petrol stations, attractions, McDonald's, etc., He has things like tickets, phone numbers, etc all listed, printed out and also saved on his phone. When abroad, he takes photocopies of passports, driving licences and insurance details, one set of copies in each suitcase and hand luggage "just in case" an item of baggage gets lost, and as for packing, we have to spread our clothes over all suitcases, so that if one gets lost or stolen, we'll all be able to get dressed from what was in the others!
I suppose it's good as I don't have to think about him at all - he's always one step ahead, but sometimes, his level of planning and paranoia does irritate me, especially when we end up doing extra shopping and then having to spend time returning to take loads of stuff back.