Roast beef - usually brisket, so I cook it on low for an hour longer than recommended, in a foil parcel with an inch of water inside - fab gravy! - or if a rib roast (rarely!) I rub the fat with mustard powder and follow St. Delia's recommendations), then to go with I make roasties (with goose fat, dripping or lard - or a mix of all three, cos I save my roasty fat ), yorkshires (individual ones with a well for the gravy), carrots, peas (we have to have peas ), broccoli and one other depending on what's in the veg box that week. If DH's family are around I have to do mash as well....
If I do a chicken I do bread sauce(Delia recipe again), pig in blankets, and follow the lemon up the bum route. For a good chicken gravy I confess I use granules in the cooking juices (Sainbos own brand are hydrogenated fat free) and a glug of that 'touch of taste' chicken bouillon - probably more than recommended, but it makes it taste yum!
Turkey crown is stuffed under the skin with a mix of grated courgettes, onion, garlic, herbs and ricotta cheese - makes it beautifully moist and goes well with mediterranean roasted veg and garlic/rosemary new pots in their skins, for a change.
Leg of lamb is studded with rosemary and garlic slivers, buttered and then for the last half hour spread with redcurrant jelly - makes the fat all lovely and crispy-sweet.