From a songwriter's point of view, what is the best/your favourite chord sequence? This is an area of writing I find hard to be original in.
My favourite is the opening of the Headmaster Ritual by The Smiths, or Bigmouth Strikes Again which goes like this:

C#minor, C#Minor , E , F# , C#Minor , C#Minor , A , B

Classic.

My top 3
1. G, C#, A, F

2. B, Ebm, A, C#m, G, Bm, F, E

3. C7, E7, F#m7, D7, A7, F9, E9, A7

rip me off i dont give a toss, my mum told me to share.

Don't mind if i do

Ha...I'm afraid I dont have a fav. But when trying to impress friend with a EXTREMELY simple sequence I use a...

D, Am, Em

Interesting trivia related to this subject: Irving Berlin, maybe the most successful popular composer of all-time , was only proficient in one key. He had a capo built into his piano!

I suppose one key is all you need. you can always transpose it to different ones after it's written.

D-D11-Am-D-D11-Cmaj-D-D11-Em.

Works better as a pre chorus, but it's a nice progression. Don't bother about playing barres if you're playing it on the guitar. just raise the F# in the D chord to a G. (hope you dont find that patronising.....)

I-vi-IV-V-I in any key. it's just so classic, you know?