I found that The Swarm made me feel less sick when I got off than when I got on it! I find what I eat can have a big impact on how I feel after rides. Fast food and rides are not a good mix!!!
Absolutely. Thorpe, in particular, on a quiet day can be a killer for that, as the rides are all so close together. Pizza Hut buffet plus walk-on queues = a brief chunder session in the toilets. Still went back on other rides afterwards though.
Funnily enough, the same thing then happened to my friend a couple of years later.
As for age - I'm 35 and still love all types of rides. Cedar Point, Canada's Wonderland and (possibly) Six Flags Great America are all on the cards next year and I can't wait!