I like heirloom seeds of most types. Novelty items that have unusual colored fruit, taste, shape, etc. Eye catching varieties. Varieties that have scored high in taste tests. Perennial Flowers for zone 6b.

Some specifics I am looking for:

Supersauce Tomato (new from burpee 2013)
Tomato, Tomatoberry Garden Hybrid
Tomato, Sunny Boy Hybrid
Tomato, Big Rainbow
Tomato, Burpee's Long-Keeper
Tomato, Red Zebra
Tomato, Super Italian Paste
Tomato, Caspian Pink
Melon, Creme De La Creme Hybrid
Tigger Melon
Watermelon, Moon & Stars Heirloom
Pumpkin, Atlantic Giant
Pumpkin, Jarrahdale

All of the following seeds are organic, from my own garden, open pollinated, and were harvested this past (2012) season. All of my seeds are stored in ziplock bags in an old fashioned root cellar to keep them cool, and good for longer.

You can see pictures of most of what I grew here: http://s8.beta.photobucket.com/user/gr8heather/library/Garden seeds

Rio Grande Hot Chile (RARE, Heirloom)

Early Moonbeam Watermelon (RARE, Heirloom)

Oaxacan Pink Tomato (RARE, Heirloom)

Thessaloniki Tomato (RARE, Heirloom)

Sweet 100 Tomato

Green Tomatillo

Red Sweet Cherry Pepper

Banana Pepper

Orange Bell Pepper

Red Bell Pepper

Yellow Bell Pepper

Jalapeno

Sugar Baby Watermelon

Honeydew Melon

Yellow Dewlicious Melon (just a few)

4th of July tomato (just a few)

Liatris

Mixed Gazania

Sparky Marigold

Seeds I bought, or traded for:

Pink Hibiscus

Catnip

Chinese Forget me not

Cat Grass

Certified Organic Seeds from seeds of change, very limited trading quantity:

Motherwort (Heirloom, Medicinal)

Red Stalk Celery (Rare/Heirloom)

Oregon Spring Bush Tomato

Early Palla Rossa Radiccio

Rouge De Grenoblouse Lettuce (Heirloom)

Thai Green Lettuce

Gold Currant Cherry Tomato

Northern Pickling Cucumber

Porter Improved Tomato

Garden Balsam (medicinal)

Round Black Spanish Radish

Greek Amaranth

Four Seasons Lettuce (heirloom)

2013 Seeds From Ohio Heirloom Seeeds Co. (all heirloom seeds):

Swiss Giant Mix Pansy

Broad London Leek

Plum Lemon tomato (very limited quantity)

Italian Lavender

Purple Coneflower

Black Beauty Eggplant

Bianca Rosa Eggplant

Pineapple Tomato (very limited quantity)

Pertsewidnij Schelmij Tomato (very limited quantity)

Mortgage Lifter Tomato

Cosmic Purple Carrot

Atomic Red Carrot

Other Purchased Seeds, some are several years old:

Burpee Organic California wonder pepper (11/11)

Burpee small fancy gourd mix (11/09)

Little finger carrot (11/09)

Sugar Snap Peas

Ruby Queen Hybrid Sweet Corn (11/09)

Sugar Dots Hybrid Sweet Corn (12/09)

Burpee Space Hybrid Spinach (11/09)

Strawberry Seeds