Put some flat pedals on my soul about 4 months ago, and feel slightly robbed that I haven't faced a huge transition or opportunity to relearn how to ride. Got some superstar nano's cheap and some bargain Sombrio's shoes off CRC, and within a couple of rides didn't really think about it? I only did it because I was putting my spd's on my grrrrrrrravel bike, so thought I would give flats a go. Shin's intact, and I can't say I now even think about it. I flit between spd's on the bikes, but haven't really stopped to think I should put spd's back on my mtb for a particular ride. But they may change in winter boots season, but that's more about the weather. It's all personal preference as said, I just don't see it as a huge deal. I have a lot of shoe's though!!
Far too easy to hit things with flats
My current flats are nearly half the depth of my Time SPD's, so hit less.
My current flats are nearly twice as wide as the width of my Shimano SPD's so hit more.
But I guess it depends on what and where you ride. Snaking thru rocks in my case.
Oh and the other thing I forgot to mention before... yes I do still twist my foot off the flat pedals, being so used to doing the SPD release flick.
I've tried spd's on a mountain bike once. It was the worst ride ever.
I've rode flats on bikes since I learned to ride, spent my childhood on a bmx and was at a pretty good level (freestyle)
It just felt unnatural to be clipped in.
I do have them on my road/cx bike but I still don't like them on that.
I started with toe-clips - yes, proper toe-clips and soon ditched these in favour of Power Grips - anyone remember them?
[img] 
[/img]
Then I went to flats for a few years
Then I tried CB Mallets and have stuck with them ever since - there's that much float and they are so easy to get out of, very rarely have any clipped in accidents.
Thought about trying flats again when I got the Capra, but stuck with Mallets
spent 15 years on SPDs, having bought them pretty much straight away with my first MTB. After my second injury in 3 years due to not unclipping (torn ankle ligaments and then a snapped tibial plateau, both in the Alps) I decided not to risk a third and moved to flats. Took a long time to bond with 'em, now I wouldn't go back. I perversely I feel more secure on flats as when my feet are weighted they are planted on the pedal and going nowhere - I have spds on my CX bike and the rotational float is really unnerving now!
Munqe Chick seems to get on with both equally and currently has flats on the FS and SPDs on the HT.
