Chicken doesn't want much smoke and it should be a mild wood. Apple or grapevine would be great.
Ribs can take a bigger wood such as Oak or Hickory. Mesquite has such a strong smoke flavor that you have to be quite experienced to use it. It can make food uneatable(it that a word?).
I like chicken in Apple, ribs in a combo of apple and hickory. Just don't overdo it.
Large Big Green Egg, Cold smokehouse,
UDS with hinged lid, Santa Maria pit
26.75" Weber OTG, Weber Performer, WGA
MAK One Star General Pellet Pooper
Hasty Bake Gourmet
Custom wooden handles for BBQ's made by Marty Leach (oh, that's me)