Alton Towers:
Runaway Mine Train: State the obvious, I've ridden it a few times in my childhood and it wasn't bad, but I'm really looking for the thrills.
Congo River Rapids: When with a family its ideal, however with friends you'll just give them a miss.
Hex/Duel: Both are fine once, but when coming back it's just extra time wasted at Alton.
Rita: Queen of Speed: It's not really a ride to rave about when visiting, if the queue is under 30 minutes then its worth a spin.
Most flats: The majority are fairly poor flat rides (minus Ripsaw), and if I'm at Alton I mainly spend time riding rollercoasters than flats.
Drayton Manor:
G Force: Only if the queue is exceedingly high, however there aren't enough rides at Drayton for an entire day, and all the rides are fairly decent.
Pirate Adventure: Ridable once, next few rides are a bore.
Thorpe Park:
Flying Fish: Another obvious one...
A few flats: Thorpe is similar to Drayton in terms of it having a small selection, probably flats like Slammer or Zodiac I'd tend to miss out. Other than these Thorpe's fine!
Disneyland Paris:
Showy rides: These include ones like "it's a small world", and Peter Pan. I don't mind trying if I'm with younger riders, I just look saft on my own.
Thats probably it for Disneyland really. I enjoy Indiana Jones and think it's great when the queue is walk-on and the other rides are packed up. Nothing unique or spectacular, it's just a genuinely fun ride!
PortAventura:
Stampida: There's normally a huge queue and the ride itself is nothing special. It looks amazing but it really is a waste of prescious Dragon Khan whoring time!
Flat rides: All the flat rides (minus Hurakan of course), are pretty much awful and only deserve one ride if not then no ride.
And thats about it for PA too. I really enjoy the showy rides here and find them a lot better than those at Disneyland (e.g. Sea Odyssey), so I do give them a ride at most times. Diablo and Tomahawk again are rides I consider to do a few times in a visit because I actually think they're great! And everything is good too.
I would plan to do a Blackpool pointless ride list, but there are way too many to even note down. So here's everything anyway. :--D