Would be interested to hear everyone's Mixbus workflows (again)!

I'm sure people have talked about this before but I'd be very interested to hear how people are using Mixbus. I've had it for ages but have shied away from learning it fully and have never yet completed a full serious mix in it, have only played with it. I really do like what it does to the sound once you start building up a few tracks in it. 
 
Anyway I guess people have the full spectrum of uses for it, all the way from importing stereo mixes for mastering, to tracking and mixing a full project from start to finish. 
 
My intention is to track and arrange (and perhaps "rough" mix) everything in Sonar, then import all track stems to Mixbus. But even here, I see that there are a number of different ways I could go given Mixbus's track and bus routing options. 
 
For instance, I see that I could set up all of my reverb and delay buses in Sonar, print these buses and import them into Mixbus. If I have 3 reverb stems I could import those into Mixbus and send them to one of the 8 Mixbuses. But in that case, I would be committing to doing at least some of the mix in Sonar because if I was printing reverbs in Sonar then presumably I'd want to EQ the signals before they hit the reverbs etc. Same with things like delay buses. Not sure I want to go down this route as I rather like the idea of doing ALL of my mixing in Mixbus, not just for the sound but for the psychological benefit of closing down the tracking phase and starting the mix afresh with nothing but finished stems. 
 
I see that Mixbus also has "utility buses" like Pro Tools' aux tracks - are you using these as effects sends? I'm not sure how this works but I see myself perhaps setting up 2 or 3 reverb utility buses and then sending the outputs of these to a reverb mixbus, then doing the same with delays etc. So my mixbuses would end up as (for example) Vocals, Keys + Leads, Bass, Drums, Reverbs, Delays. But what about things like parallel processing? If you were parallel compressing drums would you do that via a utility bus and then route the output to the drum mixbus? 
 
I guess this is something which will become obvious to me but right now I'm kind of overwhelmed by the possibilities. 

You think it's better to export from Sonar as 32 bit rather than 24 bit? 

I suspect that on a technical level if you have SONAR set to record 32bit then it only makes sense to export 32bit especially if your Mixbus is operating at 32bit.
 

Tonight I was playing with Mixbus and I did a Drag & Drop of a midi file onto a midi track. I instantiated Addictive Keys as I figured it would not take much resources.
 
I really wanted to see if Mixbus would play nice with midi stuff and I got a real surprise. It played very well and the Mixbus EQ & Comp gave an inexpensive thin sounding piano a very nice warm sound. I just hate it because now I am going to try to do midi things in Mixbus it probably is not ready for yet...  
 
For a while I was really disappointed the way v3 started out but v3.1 has put some new life and possibilities into it. It still has some issues but is to the point I am inspired to use it again. 

I am interested to hear how people route things in Mixbus though. In terms of which instruments are bussed together.

clintmartin
I have a Vocal bus, Guitar bus, Bass and Keys bus, Drums bus and a reverb bus. That's good enough for me, but I'm a simple guy.

Almost the same but I never put my bass on a shared bus.

What I was thinking is, isn't it partly the summing of the mixbuses of Mixbus which contribute towards its sound? In other words, perhaps the way you group things into the mixbuses has an overall effect. So that leads me to think things like: is it worth taking up a bus for just one track? Like if you only have one bass track or one vocal track, perhaps they would be better off being grouped with other tracks rather than being bussed on their own. These are the kinds of thoughts I have as a Mixbus newbie. 
 
Another observation about Mixbus: I find it funny how Harrison offer so many plugins for sale, while at the same time the manual makes this big deal about how the Mixbus console is so great, you won't need any additional effects! Seems a little "inconsistent" as it were 
 
Not bashing them too much, it's still a great piece of kit for the price.