pigletjohn I imagine is like a chap I know, solidly built but NOT fat, kindly blue eyes, brown short back n sides (to control the curl, when he's getting to point of needing a cut random curls Spring free), bit of a lopsided grin. Mostly in jeans and sweaters, but nice ones, colourful sweaters.
AF - short stylishly grey hair a la Helen mirren or meryl Streep in devil wears prada but it's not naturally grey or if not grey then pillar box red, slim but sturdy, wiry, flashing green eyes, easy smile. Practical but stylish in dress, smart jeans, crisp shirts and low heeled but elegant boots. I think she's quite tall, at least 5'9"
Worraliberty reminds me of a friend so in my head she has naturally curly hair worn long in ringlets, bit like Julia roberts in pretty woman, curvy, brown eyes. Tends to be in office wear but with quirky touches.
Bertrandrussell reminds me of an ex lecturer of mine. Long straight naturally blonde hair, very 70's that she has a habit of tucking behind of her ears when she's talking passionately, waif like slim, long fingers and a wide grin. Very much hippy/boho clothing choices.
Attilathemeerkat reminds me of another ex-lecturer, petite, softer in the body but still slim, just someone it'd be comforting to get hugs off, light brown curly hair (OK a perm - it was the 80's when I knew her), serious eyes until she laughs when they sparkle with mischief. Wears chunky knits with either jeans or long denim skirts.
Bluntness100 I think has short funky auburn hair, purple or red frame glasses, petite, curvy & unknowingly sexy, wears tailored trousers with loose silky tops and funky jewellery
All written before real life corrections.
Appolloanddaphne so sorry for your loss 
Do me - without doing an AS!