There are alot of different opinions when it comes to weight lifting. The main key is too educate yourself as much as possible.
Listen, watch and learn. Be careful because you will see alot of people using dangerous form and way too much weight.
Know and understand what you want to accomplish with weight lifting and work towards learning how to get there the right way
Personally I like to use low weight/high reps. I use weights mostly to build core strength and upper body condition as I can ride year round here in Az.