Some of my other faves are: Dose, Gwlym's, ToBL & Tina's. All can be found on the good coffee map and all run by good people!
There are other places worth a visit too.
i would go to taste of bitter love on a friday mid morning, dose friday afternoon, milkbar saturday morning, go somewhere else on saturday afternoon and then go to the gwildog on sunday morning. that way you can try a bunch of coffee and not get overly bored by the whole thing.
Please let it be noted that, whilst I highly recommend visiting Gwilym, he has never actually served me a coffee, he just tends to give interviews and sign autographs these days!
Don't think Dose is pulling shots of the Mauritania? I think they had Gimme's Leftist in though. The Mauritania we've roasted is way too light for espresso so the toasty thing is confusing.