Oh no, Gaijingirl - I can chat about plants all day long - my pleasure. Anyway, a starting point for me (and many others) is to follow Marjery Fish's famous advice ' when in doubt, plant a geranium. And for sure, the hardy geranium clan is one of the nation's favourite perennials with a number of them being long-blooming, trouble-free candidates for pot culture. Many want full sun but any of the oxonianums, phaeums, maculatum and Wallichianums will do brilliantly. So, if you want a vigourous trailing blue, then 'plant of the century' Rozanne is still in prime position. I like to see whites and lilacs in a shadier spot - they look luminous in the low light of dusk so a couple of common but worthwhile plants are the pure white, bigroot geranium, 'White Ness' and have a look at the anemone family. From the lovely spring flowering anemone sylvestris through to the late summer Japanese anemones (of which Honorine Joubert still reigns supreme as a single white. Then there are the 'Swan' family. Based on anemone rupicola, White Swan caused a sensation because of its long blooming cycle...and others followed (I have Ruffled Swan). All do well in pots and shade. Hostas are traditional shade-y pot plants but the snails...and slugs - it will look like mince in a week. But the Japanese Forest grass, hakenochloa aureum is a terrific container grass (although cats and dogs will treat it as a salad bar). Finally, the reliable New Guinea impatiens (not the old bizzie-lizzies because downy mildew) but Impatiens hawkeri (I think) which is resistant to the virus which has decimated nursery stocks of impatiens wallichianum.