I am thinking about getting a seat to attach to my bike so I can start riding again with my daughter.. I have a mountain bike if it makes any difference ...for people who ride with toddlers what is your preference for taking them biking? I have seen the pull behind trailers, seat that sits behind the parent, and the seat that is between parent and handlebars.

I had a trailer for a while but didn't feel comfortable with it.
I worried about vehicles when I was just driving in the neighbourhood and it was no good for the gravel/dirt bike trails (even though they are fairly wide and flat)

I really would love to try one of those seats where the child is between the parent and handlebars.

I have tried numerous biking con toddler options. I have a mountain bike, and at 2 and 3 (their big kids) my kids were getting too big for the rear-type bike seats, although there are some models with a higher weight rating that the type I had. I just bought a Chariot Cheetah stroller/bike trailer and I really like it. Down side is that I had to save for months to buy it, lol. My son really liked the front-mounting seats like Weeride, but it wasn't as comfortable for me to ride with as the rear mounting type. Good luck, it's so fun to take the kiddos for a ride!

One of my first memories is actually riding in the toddler seat on my dad's bike when I was about 3. I remember it being fun while riding, but when he got on or off it was a little scary for me. I don't think those pull behind trailer ones are very safe.

One of my first memories is my mom tipping over on her bike with me strapped into the toddler seat behind her. Toddlers can't bail from a falling bike and even being completely safe in the seat and with a helmet on it can be very traumatizing to the child. It took me a long to go on or even go near a bike after that.

There are some good reviews of the options on the 'Simply Bike' blog. Might help you make up your mind.