What is the consensus on mullet for tall riders (DH)

It sounds like we have the same trail preferences. I live in Idaho and love fast, rough, and loose trails. Silver bike park, Big Sky, Angle Fire, and Whistler are my favorite places to ride. I'm 6'1", 180lbs with a 34.5" inseam. My legs are long enough I don't have any issue with clearance, but I do use all of the clearance on both mullet or 29er occasionally buzzing the tire on either wheel size. I've been riding strictly 29ers for the past 6yrs and just set up my first mullet DH bike, a Zerode G3 last season. My previous bike was a 23 Range XL full 29er. I loved my Range and I love the Zerode, both are high pivots that don't hang up at all. I can't tell a difference in the wheel size one way or the other in any rough loose chundery section at any speed, but I can tell a slight difference with turn in entering a corner. The Zerode is a little sharper turn in without loosing anything performance wise anywhere else. I would say this is a benefit as much as a stronger and lighter wheel is a benefit. The only downside I see for the mullet DH is the logistics of 2 wheel sizes on the same bike.

 I enjoy high pivots and currently ride an Optic 29er as my trail bike. I definitely prefer a 29er for trail and all mountain. Enduro would be fine either way, but still a slight preference to the 29er. Not only is the 29er nice to cover ground, but they can slow down the handling just a touch making it feel more like the DH timing wise so I don't over steer, or turn in to early on every corner riding the trail bike after a couple of days on the DH. It works for me.

I've also found 500 to be my sweet spot for reach and I like a long chainstay. I rode a Druid v2 last season in s3 29er. It was a little short on reach, but the chainstay was great. If I got another one I would run mullet in a s4. That geo looks perfect for me and my usual trails in the summer. I would be a little apprehensive about the s4 29er though, I am forced to ride some tighter trails in the shoulder seasons that might become a little cumbersome, less all rounder. 

I was running the Range as my 1 bike to do it all. Trail, big mountain days, and dh. Fox 38 and stock link. It was great everywhere, but not awesome for trail or DH. It definitely shined on big mountain days with rowdy descents. It was perfect for steep rough climbs and long rough descents. It took more effort to enjoy it on mellow trails, and the fork definitely held it back on DH days.The reach could be a touch long for the bike park. It put just a little too much weight in the hands. I was pretty sore on day 2 at whistler, but was fine after that. The rear suspension is still probably the best I've ridden for an all-rounder. I never fiddled with it, and never worried about what the rear end was doing. That says a lot, I'm definitely a fiddler. It's taking me a little longer to get the Zerode rear end to be as over-all balanced although it does perform to a higher level riding DH as one should expect of a bike set up for just one task instead of all. That's why I ultimately went back to a trail bike and DH bike. Less compromise. I just have to run heavier tires on the trail bike, and make sure my forearms stay fit enough to hold on for the long rough descents on the big mountain days. 

This season I'm on the optic s4 29er as my trail bike. The Druid was an excellent all mountain bike, but I wanted to see if I could go to a trail bike to cater to my weakness more than my strengths. The wheelbase is the same between the two, but the ratio is different. It seams to be a great mix for a trail bike. I've only ridden it a hand full of times on trail rides and it's been great as expected. I've had a few short moments on some rough sections and I'm very optimistic for big days on rowdy terrain. I don't think it will slow me down too much in the gnar, but should be a touch quicker and more lively everywhere else. So far so good.

6'2" rider here. I've been on full 26 (I'm that old), then 27.5 now full 29 on both my trail and DH bike. I've spent very limited time on a mullet rental. Last year was my first season on full 29 DH bike. I picked up a Fury that came stock mullet, with the option to run full 29. And I'm sure I could run it full 27.5 with a few adjustments. For all of you taller guys on mullets, whats the benefit of the 29 front wheel besides better rollover? My OCD is making it hard to go mullet over full 29 or 27.5. 

Bigger tires generate more grip via a bigger contact patch, and bigger tires also have a mellower impact angle on sharp things.

Also, as many have observed, by having your front and rear axle at different heights, you've changed your "endo angle" on the front of the bike to make it more stable, while keeping the "wheelie angle" on the back of the bike lower and more dynamic for body english in turns and on jumps. The best of both worlds.

For me, biggest advantage of 29 front wheel is confidence going over big ledges and deep holes. Definitely easier on a big wheel.

For the rear wheel, I don't feel any advantage having a 29, but the loss of agility is noticeable. And also the risk of tyre buzz is higher.