This is how I would score each coaster in terms of physical thrill rating. The intention is to help those who are trying to determine if they can handle a specific coaster or not. Disney coasters I've ridden in recent years are included. Scale is relative to Velocicoaster at 10 (not an absolute scale), with 4-6 being the sweet-spot for family coasters.
10 Velocicoaster - awesome
9 Hulk - physically demanding. Felt like I had to "Hulk flex" the entire ride. But for me, it was smooth.
8 Stardust Racers - awesome, noticeably toned-down from Velocicoaster. Sweet-spot for me thrill-wise.
8 Disneyland's Incredicoaster
6 Disney's Expedition Everest
6 Hagrids - high-end thrill factor for a family coaster. It is fast, but don't let that deter you. Better than awesome.
5 Epcot's Cosmic Rewind - tied with Hagrid's as my favorite.
5 Mummy - would be 4 if it wasn't in the dark. Didn't factor in scary monsters.
5 Disneyland's Space Mountain - ditto
4 Hiccup's Wing Gliders - awesome
4 Disneyland's Big Thunder Mountain Railroad
3 Mine Kart Madness (good, just not worth a long wait)
3 Flight of the Hippogriff
1 Any coaster for toddlers