'Twat' is perhaps my all-time fave swear. Much like 'cunt' in the versatility stakes only far nastier and more vicious if used as a properly offence-intending swear. 'Cunt' just can't ever contain the level of vitriol cum dismissiveness as a properly emphasised 'twat'. Call me a cunt any time of the day or night and I'll not be offended in the slightest, call me a twat and depending on context and emphasis I'll either love ya or loathe ya forever.
Also, one of my fave uses of the word 'wanker' in musical form. I learnt so many quality swears and related phraseology from endless repeats of this album in me yoofdom. The whole album ('The Winkers Album (Misprint)') is a stone cold classic