"Ticks and Leeches?" Ehhhhhhh......
When I was a little girl and would go swimming in the freshwater lake where my grandparents had a summer cottage, every now and then one of those icky leeches would find me and attach itself to me -- YUCK!!!! Thankfully, easily removed, no harm done, but still.....YUCK!!!! Each time I emerged from the water there was an inspection by me and by whoever else was around.....
Moving on to more pleasant subjects, yes, I'm another who prefers to read reviews rather than just trust trailers when there is a new movie coming out that I might want to see. As has been mentioned, trailers can be really misleading. Sometimes reviews can be as well, although not when written by well-respected people, and it is the latter reviews which I look for, too, but even at that I take everything with a grain of salt and decide for myself if this is or isn't a movie I really want to see, and how do I want to see it? In the cinema (theatre) or at home with renting it from iTunes (several month delay there, though, before a new film is available for that) or (rarely) actual purchase, perhaps even on DVD (just did that with the "Downton Abbey" movie because I've already got the entire six seasons of that television show on DVD anyway, might as well add in this film, too).
Advantages of viewing at home, whether renting the film or purchasing it, of course means that there are no other movie viewers (strangers) seated immediately around one -- people who are sneezing, coughing, talking, rattling bags of some unknown substance, vigorously chomping and chewing.... I am sure I am not the only one who detests all of that!
In a much different scenario, instead of in a theatre/cinema, when at home, it is just so easy to get really comfy and have the desired popcorn or other snacks plus appropriate beverages at hand, and when someone else (usually a family member or close friend) starts talking or rattling something or chewing loudly, it's far more permissible to by a few well-directed words promptly stop that behavior in its tracks. When and if one or others want or need to take a break, regardless of when it falls in the storyline, that's easily done: one can simply hit the "pause" button and the DVD or streamed video pauses for a while so that the viewing audience can do whatever is deemed necessary.....