When I first started scrolling, I built a stand for my saw. Not knowing any different, I made it a height suitable for standing and used it for several years. Eventually I migrated to sitting and now have a comfortable, adjustable height, swivel, drafting chair. Whether or not you sit or stand, the key is proper ergonomics. Your body should be positioned such that you don't slouch and that your arms & hands are at a comfortable angle. If the table is too high, your elbows & wrists will be bent at a sharp angle and you will likely find that your hands may get numb after a while. If the table is too low, you will tend to lean over, hunching your shoulders, in order to see what you are doing. This causes stress on your neck, shoulders and back. These same conditions apply to standing or sitting.
As for the tilted table, I scrolled for several years with the table flat and for the past several years, I've had it tilted. I prefer the table being tilted slightly. I think it helps achieve a comfortable position, but it's very much a personal preference. As I said, my chair has adjustable height. Sometimes I will adjust the chair slightly, just to change the height a little, which can change up my work position and help relieve stress & strain. If I'm cutting something small & detailed, I might want to be a little closer to the table. If the piece is large and I need more room to swing it, I may sit a little higher. Plus, the chair is also on wheels, so I can swing from the saw in and out or also to the workbench bench and back very easily and comfortably. I would suggest that you not do anything permanent yet, until you determine what is most comfortable. Also, consider your work flow. Does your set-up allow you easy access to other areas for sanding & drilling & other prep work? Some folks will sit and saw for hours at a time. Personally, I like to get up every hour or so, if for no other reason than to stretch a little. I'll use this time to do other tasks to break things up a bit. You will find a process that works best for you.
Sorry for the long winded reply. Hope this helps.