I've just recently returned from a week-long trip to Los Angeles. I gotta say, it's not what I expected at all. Sure, the air is polluted (but so is the air in London), and the roads are packed with traffic (again, so are they in London), but LA is actually a very beautiful and pleasant city. Assuming you don't live in downtown LA, of course.
One striking point for me was the sheer scale Los Angeles; it's one big city... I mean, London ain't no slouch, but in terms of pure land footprint, LA is miles ahead, pun not intended. The highlights of my trip would be my day at Universal Studios and City Walk, as well as my trip to Malibu Beach. Cruising down Sunset Boulevard was fun, as was visiting Hollywood, and Beverly Hills. I just wish I had more time, would've loved to have driven down to Newport Beach. I'll just have to wait till my next visit.
I regret not taking my Nikon D70 with me though; Malibu Beach on a beautiful, sunny Sunday was just incredible. The views from the top of Universal Studios was breathtaking, and I would've loved to have taken some nice pictures of the Grauman's Chinese Theater and the Hollywood Hills. Alas! The immigration policy in the US is still very strict at the moment, and I would've had to check in my camera. Without a suitable hard travel case, that just wasn't an option for me.
So there I was, in LA, with some truly beautiful views all around me and all I had was my crappy mobile phone camera!

I am adamant such an event will not repeat itself. My camera comes with me now, no matter the hassle.
On another note, I bought myself a brand new 15" MacBook Pro while out in LA. I've now got it hooked up to my 19" monitor, running a dual screen setup. I've also got my old, trusty 12" PowerBook G4 hooked up to my 15" monitor, running a dual screen. So I'm basically staring at four screens! It's all hooked up to a Mac Keyboard (which is just so sleek) and my Logitech mouse, as well as a 1TB external HDD. Yup... I plan to never delete anything ever again!
The shopping was nothing short of bliss. Things are so much cheaper there compared to the UK, and indeed, the world. Ended up buying a few shirts, a pair of trousers and a navy blue jumper from Tommy Hilfiger, a new belt from Kenneth Cole and a cream jumper, a light hoodie and a heavy hoodie from Abercrombie & Fitch. Also bought a Black BC Rich Warlock guitar (fixed bridge) and a gig bag while I was out there. The BC Rich should nicely complement my Mirage Red Ibanez RG1570 Prestige, which is too precious to drag around... hence the new guitar for trashing about.
Another thing I'm adamant not to repeat? Bringing a small suitcase... Next time I'm out in the US, I'm bringing a monster of a suitcase with me to fit all the stuff I'll be buying.