Hmm from your profile it looks like you play rock/metal type stuff. It might be a good idea to get an od/distortion/fuzz or a combination of them. Read the distortion mega thread to find reviews of different ones. If you like to funk stuff up, go for an envelope filter and a wah pedal. Some people like to thicken up their sound with a chorus pedal. An octave pedal can be a fun and funky toy to play around with too. I already have an active bass and a good amp, so I really dont need an eq pedal, but you may want one to help dial in the tones you're looking for. Also, if you dont have built in compression on your amp, it would be a great idea to get a compression pedal. Just find a few effects that you really like and start from there.