I'm more of a buy-buy-buy, run out of room, and deal with it-type of person. lol
I buy tons of orchids because I love having something in bloom.
So I usually buy whatever I find attractive.
If it is something really really common (like white phal and yellow dancing lady common) and cheap, which most of them are, I simply toss, give away or sell the plants once the flowers are gone.
I do have many that I keep year around.
These are something that are not so common, and (or) something that grow really well under my care.
My collection is mainly:
Paphiopedilums- because these are all precious to me, all seed grown and I am the only person with these plants in the world as paphs are not meristem propagated yet. Also, many are easy growers and bloomers with long flowering season.
Some have beautifully patterned leaves, so waiting for flowers is less painful.
Because most paph hybrids are literally crap, I buy tons and toss most of them as they come into bloom.
now I am thinking of buying flasks to spend less money on paphs, while hopefully increase my chance of getting something decent.
Dendorbium nobile hybrids, phal type&spatulata hybrids- Again, easy to grow and flower, long lasting flowers, beautiful to look at. One down side is that many are rather big, but they go up rather than spread horizontally, so doesn't take up much space, but watering is pain in the butt as I carry them one by one to the shower tub. lol worth it for me though.
Oh, and many are beautifully scented.
Cattleya hybrids- gorgeous and fragrant big flowers.
Enough said.
Oncidium hybrids- long lasting beautiful flowers, but
tend to get rid of them once I see
ugly spotty leaves creeping in. lol
Easily replaceable, but I do keep
ones with clean leaves & fragrance.
Phals- I am only keeping two or three large phals which grow and flower well for me. They take up much space with their wide leaves, and are cheap and common, so I buy them and toss mostly. I also keep a few minis that I find cute.
Then I have a whole bunch of different orchids that are not so common for fun.