Salt and vinegar, all the brands I've tried so far.

I love prawn cocktail Pringles - wish I could get them here in the U.S.

Salt and black pepper. I can't understand why it's a 'niche' flavour, much nicer than salt and vinegar.

Zapp's Cajun Crawtators...yum! Kettle jalapeno are also really good.

I'm not very sophisticated when it comes to chips (crisps)

Plain old Lays potato chips and Fritos corn chips

In the UK, another vote for the Salt & Balsamic Vinegar Kettle Chips, and the newish Walker's 'baked' salt n vinegar. I also like the 'Real' brand (our local pub sells them, most flavours go well with a pint!). In the US I like Lays bbq or honey bbq and the kettle cooked mesquite bbq ones. Here in the UK bbq crisps are very meaty, but the Lays ones taste more like bbq sauce.

Tyrrel's vegetable crisps (parsnips/carrots/beetroot, etc) are nice but VERY greasy and cost a lot too.

Ohh that reminds me of the Phileas Fogg Punjab Puri crisps - ohhh they were seriously good! My father was a huge fan, and there was often a bag on the go (he would have a small handful as a pre-dinner snack, often with a glass of wine or beer, but mother has curtailed his habit after some none too favourable cholesterol readings!) Can you still get them, I haven't seen them in years!

I could subsist solely off of Zapp's and Abita Amber.

Salt & Vinegar or Sea Salt. Any kind are fine with me.

Tangentially, I recently discovered Snyder's Hot Buffalo Wing Pretzel Pieces and I am totally addicted.

i love these too!! an american company (herr's??) just came out with a ketchup flavor, but it's not even close to the canadian ketchup...

Lays Smokey Bacon

Poore Brothers BBQ or Salt and Vinegar:

http://en.wikipedia.org/wiki/Poore_Brothers

On a side note, the vending machine at work has been stocking Puffy Cheetos. I hadn't had them since elementary school so I bought a bag and wow did they take me back. Nice piece of nostalgia there.

Three others on my honorable mention list...

http://www.taquitos.net/im/sn/Munchos.jpg
http://media.comicvine.com/uploads/1...-BBQ_super.jpg
http://www.nationwidecandy.com/mmCAN...ries_small.jpg

I have a preference for these.

http://d3hqdt8j93rgvn.cloudfront.net...9ae2c95293.jpg

Ooh, I forgot to mention PopChips, which are kind of like potato chips, only much lower in fat and 90% as delicious.

Salt & Vinegar
Salt & Pepper
Cheddar

Yum