I don't think you can have too many pedals, but I think it's possible to have too many hooked up at once to the point that you spend more time tap dancing than playing. I probably have over 30 of the critters and do use them all (mostly at home) but, with my band, I have seven on my board and one of those is a tuner. It's not like I purposefully limited the amount that I use with the band, it's just that those were the only ones that I found myself actually using.
I use 15 myself.. It's a good amount. I find I need that many to do my gig and to pull off all of the recorded tones necessary. I can play and tap dance at the same time no problem. I love tap dancing.

But I find that I've got my board memorized very well and I think it is just fine.
I find this just works best. I've tried smaller and bigger boards than this, and I find this is the amount I need to be able to do my gig. Pedals are my tone factory and where my tone comes from. Mainly different flavors of distortion and overdrive and using different ones for each song and changing guitars every song to get the original tone. I'm a busy guy onstage changing guitars and tap dancing and playing. But I wouldn't have it any other way. I play big stages pretty much exclusively and I don't do the bar/club thing and pretty much only do festivals, parties, events, etc where I have a big stage to play on and have no problem bringing 5 guitars and 1-2 amps and my board. I find that I prefer that environment the most. Most of my shows are outdoors and I only gig in the spring/summer.
I think everyone has different needs and one cannot dictate for all what size board they need or how many is too many. I spend a lot of time explaining my board to people who say I have too many when it's really not their place to say so and they aren't in my shoes... "But so and so doesn't need them and he only uses 5 pedals and he's a great player". But he ain't me. And playing has nothing to do with it.... It's about what you need to do what you do. Every gig is different and as I've said many a time - gear isn't one size fits all.
BTW - my rant is not directed at you - but rather a general rant... Some people like to tell me I have too many and compare me to others that have less.... They can KMA!
