I personally have made at least 2 crosses that single handed have set orchid breeding backwards at least 50 years.
Paph (fowliei x callosum var sublaeve) and Odcdm (hastatum x bictoniense). Actually the Odcdm hybrid is very wispy, small star shaped flowers, and low flower count, but they do have incredible colors.
At least one of my crosses worked out pretty darn good. Phrag. Inca Embers (Andean Fire x longifolium) has received a number of AM's and HCC's to seedlings produced from my seed pod. But that cross was made two decades ago. Old news.
I took a flower with terrible form but small growth habit, Paph fowliei, and looking to produce a tea-cup sized Maudiae, cross it to a dwarf-ish growing Paph callosum sublaevae. The callosum I used was below average in the form department, it also had weak color. Its only strength was that it would bloom at about half the size of a normal Paph callosum. Well, the outcome was as expected, hybrid vigor gave larger plants than either parent, and the flowers were wretched. The worst of the form traits of Paph fowliei, including rolled and reflexed petals and narrow dorsals, from the callosum the habit that the dorsals rolled backward at the base. They were UGLY. I ended up composting all of them. It was some 8 years of work down the tubes. Yes, 8 years. 1 year to mature pods, 18 months to get replates back from lab. and another 6 years waiting for the best ones to bloom a second time to see if they really were that bad. Yep, they were. So the lesson is, it is possible to make horribly bad orchid hybrids. It is expensive to make bad hybrids. They cost the same to make as good hybrids. They also cost the same amount of time.
A successful cross, or at least not ugly. (fowliei x wardii) the wardii is strong on transmitting flat, wide petals. Wardii also picks up the color from its other parent and moves it around a bit. So the end result was a pleasant, tea-cup sized hybrid, that strongly favored the wardii parent. I was so disgusted with my earlier fowliei cross, I never registered this one. I believe Ross Hella has remade it since.
So we know callosum can make excellent hybrids, we know fowliei can make good hybrids (just check Ross Hella's website). It is important to realize that when making a cross, think about the strengths and weaknesses of each parent. If both are weak in the same category, the result will be even worse in that category. Always choose parents that compensate for the other parent's weaknesses.
The rest is simple once you get that. The earlier lists of traits to consider in breeding all apply. For example, it is important to realize, crossing a plant that is slow to get around to blooming with another plant that is also slow, the offspring will be even slower on the average. So many of the non-AOS award criteria are very important to keep in mind when making crosses.
I encourage you to try. My first cross ever was to cross 2 different clones of Broughtonia sanguineae. The results were encouraging, nice average looking progeny. No wards, but none had to go to the compost heap. Then I tried my hand at the Oncidium Alliance, then moved to Paphs, then Phrags. I largely stopped breeding about 12 years ago. I may get back into, I have a couple pods hanging right now. Good luck.