i've known a few folks who won't try clipless again because of bad first impressions. I suggest speaking with an LBS on your riding style. Many of us have cycled through many varieties, I started with SPDs but wasn't from me then gravitated to Speedplays then to Look and more recently back to Speedplays, after using the Look the Speedplays seem to have way too much float when off the saddle. However for MTB, I'm a huge fan of Eggbeaters. They are the easiest for me to disengage, but I know they are not for everyone.