who only by moving can balance

First and always: Cambridge. Cambridge, which I've seen through enough different eyes -- town and gown, resident and caretaker, political and utterly independent of any given inhabitants -- Cambridge, which had me for two decades and change, and has me still. My parental home is a 1960s newbuild semi in Arbury; my college contains an archway that predates its foundation in 1350, that's had chunks carved out of the limestone by bicycle pedals over the last hundred-odd years. I've laughed, fondly and otherwise, at the new undergraduates with their shiny new college scarves and no idea how to cycle; I've dodged punt touts and helped my baby brother pass his hiring test to be a punt chauffeur; I've rummaged through the stacks in the University Library and put up and repainted street-signs. I know where the permanent graffiti is and I remember some that's been and gone; I've delivered leaflets at 6am on election morning and I've observed the counting of votes and I've walked across town at four in the morning from the Guildhall (where the outcome was known) to a common room (where people were glued to the news); I've walked across town at two in the morning (Homerton to Trinity Hall) very solemn and slightly wobbly with a viola; I've leaned my forehead against stone and felt where it's come from and been reassured by its solid indifferent presence; I've punted to Grantchester and back and eaten strawberries in the meadows in the sunshine. I've lost and found and found and lost religion and confidence and friends and trust and love. Cambridge is mine, or I am Cambridge's, and so it shall be forever, amen.

Zürich was next. I spent a summer soaking up sunshine, glancing up from my commuter paper to see the Alps crowned with glaciers as we crossed the river, looking out the window on my way to tearing down the stairs from the eighth floor to see the turtles and the fish in the pond way below. There are fields opposite the Spital Limattal -- apple orchards up the hill, but immediately opposite - by the bus stop - pick-your-own flowers and an honesty box. I found cafes and restaurants and friends and I learned a whole new language and I lived by myself absent a support network for the first time, and I explored and I fell in love with museums and was baffled by art and I swam in the lake and learned to like blue cheese on a Roman customs point in the rain overlooking a river with P. I miss pear bread most of all.

I didn't learn how to love LA. Mostly I got as far as baffled affection: for the sky that only ever got as dark as a glowing orange-purple, that turned opaque blanket of smog when you drove high enough into the mountains to see the stars, that left my lungs a wreck for six months; the fantastic street art and terrible public transport; the storm drains and dry river; the jacarandas and the humming birds. My experience of LA is less that, more a haze of heat & food & Caltech campus, with a dream-sequence weekend-long road trip up to the Bay Area somewhere in the middle.

And, of course, London. London, and its river-that-is-a-dragon. I would (as I thought) have hated moving here when I was 18; now I find myself delighting in how joyfully small it makes me, in exactly the same way I am small when I look at the stars or (closer to home) the Moon. I don't belong here but the river-dragon will let me stay a while, and so for now I will fling myself into proms and parks and concerts and gigs and museums and the poetry library; I will stand breathless with delight on the bridge at Embankment or at St Paul's; I will be a mirror for this city and the city shall be a mirror for me, and I will learn more about how people work and more about how I work and I will adore its trees and mysterious statuary and, most of all, I will learn.

(Honourable mentions go to Oxford and to Edinburgh, neither of which I understand, in part because of how intensely my experiences of them are bound up with how I relate to the people I love who relate to these cities; to my patchwork understanding of Heidelberg, all castle and computational linguistics and music and cheap beer by the river; to Rome; and to Paris, and in particular the sunrise walk between Gare de l'Est and Gare du Nord, and a toast to fifth-floor balconies and wine, and croissants by the Seine at dawn.)