Like I said, this is just personal taste, but:
1) Brooks saddle on a carbon frame? 
You Brooks people like 1940s technology on your bums but prefer 21st Century technology under your hands. Why?
Because it works
Seriously, if I can get off a bike having ridden 1000km in the last three days and have no backside issues, then I don't care how old the technology that achieved that is.
2) Saddle is slammed all the way forwards, which suggests the frame is the wrong size.
3) Bars are almost level with the saddle, which suggests the frame is the wrong size.
4) Bars are pointed up, which again, suggests the frame is the wrong size.
The saddle and pointed-up bars were wrong, the fit hadn't been tweaked (and as I'd assembled it at an angle on a stand, the bars actually looked right when I bolted them on). I've tried this frame size and the next one up in stock bikes; the next one was definitely too big.
For bar height, that was due to back problems. Earlier this summer I realised that I don't have the problem any more (a core strength increase, I guess), but I've only just started to gradually lower them to gain a more aero position now that my main goals for the audax season are done - I didn't want to risk a DNF due to making too radical a difference. I rode LEL and Mille Cymru with the bars higher than my saddle on my Audax MK3!
5) Horrible "girls's bike" frame with sloping top tube and "sportive" long headtube, made even worse by gimmicky elastomer inserts in the stays and forks.
I don't dispute that the elastomer is ugly. Gimmicky? Well, the Roubaix is one of the smoothest riding carbon frames. Perhaps it's the inserts, perhaps something else. Whatever the reason, it works. If I wanted a harsh sunday racer, I'd have gone for a Tarmac (or, more likely, one of any number of carbon race bikes). But that's not what this bike is for - I'm aiming for a fast long distance machine that I can sit on for days on end (but hopefully not as many days as it takes me on my Audax MK3!).
MattH, I wish you many happy miles on your steed, but it just doesn't float my boat.
I can understand that. I don't think anyone would claim the Roubaix is particularly pretty. I came very close to building a Cervelo RS instead, which is much prettier, but in the end the ride wasn't as good and as all I'll see is the top tube when sitting on it, I don't care
I did also consider a new Ti, 853 or 953 build, but ultimately that would have ended up with a bike too similar to my existing audax bike, just a bit lighter.
In your defence, I notice you don't have 3cm of spacers above the stem and big eff-off saddlebag.
It's only missing the bag because I've not got around to fitting it! I'm sure you'll love the way that it balances out the bike once I've got one on it. Carradice and carbon - a marriage made in heaven.
