ooh, this is fun, some great replies here! I'll type and see what comes to mind
1) Even if money were no object, my film camera of choice is an EOS 300X... which I've painted with a reubbery, black paint and LOVE! (great AF, works with all my EF lenses, modern features; bracketing, metering, multi-exposures etc)
2) I shoot film from "Poundland" and hoard it, scared that they'll one day run out! (AGFA ISO 200 stuff, very vivid colours! @ £1 for 36 Exposures)
3) The best place I've found for prints in England and Scotland is an ASDA Store (Walmart) that's just down the road - this particular store has monstrous AGFA printers, like small military tanks - therefore awesome, right?!
4) I LOVE the tiny viewfinder on my 100D/SL1 - I feel it prompts me to consider the "gestalt", the composition from a thumbnail like perspective, not unlike a good graphic designer prepping stamp-sized compositions.
5) I sometimes DISLIKE the larger viewfinder of my 5D3, wishing I could zoom out for the above stated "gestaltness"
6) I feel I've had GREAT success with ND Grad filters that cost peanuts offa' eBay - They're actually Grey but I love the results, both with the AGFA film and digital, with the likes of the underrated Tamron 17-35mm f/2.8-4
7) I bought a 70D and kept it in mint condition, now to sell on as new, knowing it's unnecessary and I'm happier shooting my 5D3 and just having a choice of a 2x Extender (with 5D3 ISO capabilities) and a 100D/SL1 in my bag, as like a high-pixel-density pre-cropped digital back, if I need it... eff-yoo, unnecessary 70D!
I believe the 400mm f/5.6 is freaking AWESOME!! The best camera is the one with you, as is the best lens, and this thing, in it's case, is like a third of a small/standard backpack and little more weight than carrying a drink bottle, IQ is amazing, IQ is amazing despite naysayers and IQ is amazing. Coupled with this generation's FF sensors' low light capabilities this thing's ace!
9) For size, weight, IQ, price... I believe Tamron's lesser known 55-200mm lens is a gem and don't really understand how it's managed to go so unnoticed..
10) I don't really shoot with flash much, but for around £8 on eBay you get these wee bounce flashes which produce amazing results that complement fast primes with a bit of ISO push no problem... This is my favourite flash unit on the planet
I could totally keep going, apologies for hogging the thread
Loving everyone else's contributions and totally agree with the lens flare/vignette appreciation