i know Taiji styles tend to have one long form. Chen style has two forms. A lot of other kung fu styles have like a dozen separate forms.
What are Bagua forms like? Does it have one long form like Taiji or a bunch of shorter ones? do the shorter forms have individual names?
What about Xingyiquan? does it have a bunch of forms or just one?
It depends on the style.
Most Baguazhang styles include as the minimum: basic exercises, "mother palms" or static positions held while walking the circle and eight circle forms (sometimes more).
Other sytles have straight line forms (usually 64 of them) or supplementary circle forms (usually in combinations of 64 movements).
In addition, there are usually paired two person exercises, sensitivity drills, and then all the techniques and free sparring.
Xingyiquan (the Five Element based styles) include holding static postures, basic exercises, the Five Element forms, Twelve Animal forms, and a number of combined forms (usually five or six) along with a half dozen or more two person forms, techniques and sparring.
Actually, complete systems of Taijiquan will also include, in addition to the long forms: basic exercises, static stance training, footwork drills, often times separate "fa jing" training, two person drills, "push hands" drills, technique training and sparring.
when you, or if you still do, practice your martial forms, what exactly is your mind's intent focused on? Are you focusing on the things you'd be focused on during a real fight (e.g., the sun's to my back, the ground is slippery there, etc.). Or is your mind on your physicality like posture, muscle tension, coordinated body movement, seeking a smooth harmonious feeling of relaxed movement?
Does you focus of intent change as you progress to deeper levels of form training?
In Cheng style there are a bunch of basic palms (8 main ones, but I think all together their are 28 or something) which you hold while walking the circle. There are eight pig palms, these are fluid changes performed while walking a circle and changing direction constantly. There is a linking palm set consisting of 64 movements and a swiming body set also consisting of (I think) 64 postures. There are also basic excersises done stadning and walking in a straight line. And there are a bunch of weapon sets.