Well theses are the rides i liked at valley fair worst to best starting at excalibur all the way to the wild thing

                                

              

Excalibur: really rickety kind of short ride decent drop like a not so scary renegade and It wasn't to popular like steel venom or renegade not to much of a thrill ride in my opinion but it was worth going on  

Power Tower: probably the most boring but it was better then Excalibur I think its boring cause all you do is you go all the way up you drop down real quick go back up half way and drop back down the fun part is that when your at the top you can see the whole park for about ten seconds  
Renegade: I think it's the newest roller coaster it was probably one of the scariest rides it turns you on your side and makes you feel like your about to fall of { I had enough of that on another roller coaster all and all it was pretty fun though 
Corkscrew: this ride was the first ride i ever went on that goes up side down it was the shortest ride but it was one of the funnest
Steel venom: first of all think of a crazy fast power tower thats a u shape and makes you stare at while about 100 feet up at a 60 degree angle then shots you forward at about 80 mph that's easily the most scary ride at valley fair but extremely fun   
Wild thing: i think this ride is the funnest in the park and has a drop almost as tall as the power tower and towards the end you go through a huge dark tunnel yes wild is easiestly the number one ride at valley fair  

Here are the ratings in my opinion of how scary each ride is 

Excalibur 7

Power tower 4

Renegade 9

Corkscrew 8

Steel venom 10

Wild thing 9 1/2