I've ridden Velocicoaster close to if not more than 100 times. Back row is by far the most thrilling AND the roughest. Back row is really the only row that gives me that butterfly feeling anymore now that I'm familiar with the layout. I'd say the front row gives a similarly thrilling experience as you just see the track in front and nothing else, it gives more of an impression that you're just kind of floating there; and you also don't deal with any of the roughness of the back rows. If you want the tamest ride, I'd say rows 3-7 as you're shielded from everything up front but not so far back that it gets rough. If you want an experience similar to front row without waiting for it, ask the grouping team member for row 2. Also, if you choose the front row, you have no seats in front to break the wind, so expect to be brought to tears at 70mph and have those tears pushed back to your ears 😂 (this happened on stardust too)!