I don't do commercial stuff, but I too have an opinion on what to wear, though of course it isn't at all based how I present to a customer. I am concerned with dressing in a way that is practically helpful to flight, some of which may or may not be useful to you...
1. Peaked baseball type cap - goes a very long way to keeping sun glare out of your eyes, and you can get ones that have action cam mounts for easy narration / ground recording.
2. Boots / shoes / footwear that you cannot trip over whilst looking at something else, and that will remain stable on uneven terrain - we don't want to be tripping over things on the ground whilst in flight - hard to look pro when doing that
3. Mainly dark colours, so you can blend into the background when you need to, but with (in my case) white or reflective highlights - I wear my sturdy MC boots for flying, which have white fronts, which makes locating me through the UAV's camera quite easy when you may be lost in surrounding foliage. This is more of a habit from legacy days when we couldn't see on our controllers exactly where drones were in relation to us, but occasionally proves useful to be able to exclude yourself from frame where that is important.
4. A raincoat - no matter how sunny it is. I use that not only to save myself if the weather turns, but so that I have something waterproof I can instantly throw over the drone once I have got it down if a sudden thunderstorm catches us unawares. A big landing pad can serve a similar function.
5. Sunglasses, and spare sunglasses - if it's bright enough for my drone to need ND filters, then I want shades too ! For low light, I like those yellow ones that Steven Segal has been wearing since his mid-life crisis - they are actually very good at improving contrast in light levels which are slightly too low for regular sunglasses. but you will look 20% more like Steven Seagal, so swings and roundabouts hey ?
6. Not strictly clothes, but... A pocketful of plasters and sterilising wipes, for those rare hand-catch screw-ups, and so you are able to come dramatically and impressively to the aid of any fair maidens in distress you may encounter, or anyone you may have twatted on the way back with your craft !
7. Winter: As above, but more layers and something to keep your hands and remaining batteries warm as you fly. Some people like fingerless gloves and warm pockets before that, and I tend to agree with them - with so much to do on screens you don't wanna be faffing with gloved fingers and fudged commands these days.
