Love the thread title
I have a love/hate thing with pacers. My natural urge is to snarl at them but and I think it's because I now live many hundreds of miles from them, I do kind of like them.
I used to get a 142 to and from college about ten years ago. Now I did whoop and jump for joy when I looked down the line of a morn and see a 150/153 or heaven sent a 156. That is understandable though.
Back then whatever TOC it was - Frist North Western? got hold of a Valley lines livered 142 for a few months. Wow, that thing was something else. Remember how amazed I was the first time that turned up and I got a ride on it's 'proper' seats and not the usual bus seats. I was all confused - 'A 142 but it looks like a real train inside?!'
I do believe i'll miss them when they do go.
There is certainly nothing else like them!
What can be said that is good about them? - A Northern commuter can say to his South Eastern counterpart that they can keep their shiny, long, modern, safe train. For his has a toilet.

Also that area behind the driver's cab by the doors is quite roomy. Bikes and pushchairs, even both at the same time are not a problem for this area.
Gives the pacer a nice open feeling.
Ending on a serious note though. Death traps, we all know what happened at Winsford. It is a disgrace that they allowed anywhere near mainlines and proper trains. A proper train and a pacer smash into one another and the folk on the proper train will rue the spilt coffees, the folk in the pacer will be dead - the lot of 'em.
Death trap on wheels aside, God bless the crazy, bus come train, nodding, rattling, bouncing things.