Compared to Thorpe Park or even Blackpool, most of the rides at Alton Towers are too short and don't last very long, Alton is ruined by the local council's strict height restriction of nothing above tree level. For a lot of people, queuing for hours for a 1 to 2 minute ride isn't worth it. In my opinion Thorpe Park's rides are bigger, better, scarier and faster. These points may be the reason that Alton will struggle.
Not this age old argument again!
Seriously I'm team Alton Towers (and if I wasn't I sure wouldn't be criticising the Theme Park on an Alton Towers orientated forum)
If you like chaff city as oppose to beautiful countryside, then that is your prerogative. Stealth is the only ride that is faster than that at Alton towers and even that ride is very short.
I tend to find the queues are usually longer at Thorpe park what ever time of the season I visit. The rides there tend to make me sick as oppose to be thrilling. I'm a regular visitor to Alton Towers, and even on the busiest of days, it is possible to beat all the queues if you know which order to the rides in.
The height building restrictions at Alton Towers has given us a unique experiences with both Nemesis and Oblivion being build down into the ground. Nemesis is ranked as one of the top rollercoasters in the world. You can't beat the jaw dropping drop on Oblivion.
Yes I do love Blackpool for different reasons, and they have great unique rides there, some of which are very old.
But if Thorpe Park floats your boat, then that is OK by me, it just means one person less at Alton Towers which will reduce my queue waiting times