Keep in mind that I am at a disadvantage here, Jolana. It is not the norm to even see my plants bloom. If they are seedlings, I would have to keep one for 3-5 years for them to be mature enough to bloom and generally, because I never have a lot of any variety at a particularly time, I sell out of them long before blooming. The most of any (seedling) variety I will ever purchase is 25 plants. That may sound like a lot of plants, but it is not. When I purchase blooming size plants, I never purchase more than 5 of a particular variety, and again, they typically will be sold before having them bloom. That's just my business model.
Here is a list of plants that did bloom for me and which I have one or perhaps two in my own collection. Occasionally I pick out specific plants to bloom them, but though I call them "In my collection", they are for sale. I need the satisfaction that comes with having an orchid bloom, so that I know I am doing some things right, if that makes any sense.
Check my website for a description of the plants and picture(s) of the flowers of the orchids listed below. They are in no particular order, but if there is something special about the plants/flowers, I will note that:
1. Maxillaria tenuifolia - Called the "Coconut Orchid" because of its coconut-like fragrance.
2. B. nodosa - A compact grower
3. Bnts. Maikai 'Mayumi' - An award-winner and one of my two fastest growing plants. The fragrance of these beautiful flowers intensifies at night. Will often bloom twice a year as it matures.
4. L. superbiens - The species
5. Blc. Mary Jo Mcnerney - A drop-dead gorgeous flower and I have one in bud. This is more of your typical "corsage-type" flower.
6. Sarcoglottis sceptrodes - I call this the "Green Dragon Orchid" because to me at least, the dainty flowers look like dragons. This is the only terrestrial of the bunch and is of the "Jewel Orchid" family, grown as much for their beautiful foliage as for their unusual flowers. These plants are now forming their inflo. and will be in bloom in April/May/June.
7. Den. aggregatum - A compact grower with loads of flowers.
8. Bc. Star Ruby 'Xanadu' - Another with award-winning flowers. This plant is easy to grow and like the 'Mayumi', is a fast, vigorous grower.
There are many folks that watch the "Orchid" forum that grow specimen-size plants. They see lots of flower all the time. They can certainly add to this brief list of plants that bloom well/frequently. The downside is that I may not have the plants that they suggest.