A bit late to post this, but I'm getting prepared for next year.
Abutilons - (not Bella series) prefer pendulous & bell-shaped flowers like...
'Pink Charm', 'Huntington Pink', 'Biltmore Ballgown', etc.
Antirrhinum hispanicum
Begonia 'Funky' series
Coleus - seeds collected from nice, colorful, vegetative-series plants
Coleus - 'Kong' series
Consolida regalis - Larkspur 'Blue Cloud', 'Snow Cloud', etc.
Cosmos 'Xsenia'
Cuphea micropetala
Cuphea - 'Strybing Sunset', C. pinetorum aka 'Minnie Mouse", others
Digitalis 'Sugar Plum'
Elsholtzia stauntonii 'Alba' - Chinese Mint Shrub
Eremalche rotundifolia - Desert five-spot
Gesneriads - Gloxinia perennis, Sinningia (not "Florist Gloxinia"), Kohleria, etc.
Heliopsis 'Bleeding Hearts'
Hibiscus grandidieri
Hibiscus schizopetalus
Ipomoea nil - strain known as "Blue Silk Kikyo", & 'Stream of Kamo River'
Justicia brandageeana 'Fruit Cocktail'
Justicia & other Acanthaceae plants
Lobelia fistulosa
Nasturtium 'Orchid Flame', 'Tip Top Apricot', 'Purple Emperor', 'Ladybird Rose'
Nicotiana Whispers Mix F1
Pavonia × gledhilli
Pentas lanceolata - 'Glitterati Purple Star', others, especially tall varieties
Peppers - sweet or mild heat
Pepper - 'Escamillo' Hybrid (commercial)
Pepper - 'Cornito Red' Hybrid (commercial)
Pepper - 'Cornito Yellow' Hybrid (commercial)
Pepper - 'Biquinho Yellow' & 'Biquinho Red'
Salvia - many (rare, unusual species or forms)
Salvia x 'Big Blue' (commercial F1)
Salvia coccinea 'Vermilion'
Salvia penstemonoides
Salvia scabrida
Salvia spathacea
Salvia splendens 'Tall Peach'
Snapdragon (F1) 'Madame Butterfly' series (any, but especially 'Bronze with White' & 'Bronze')
Vinca (Catharanthus) 'Cora' & Tattooâ„¢ series (dibbed Papaya, thanks Alana!)
Hummingbird plants
Plants with peach, salmon, or coral blooms