I think its reasonable that Skills like Perseption or Diplomaticy are the most used skills.Consider that it isn´t to much different in Real Life. HOWEVER I think it would be a good option to increase to value of other skillchecks,so that Apprise gives the Player more Informations about things he finds or that he can determine how old somthing is. Skills like Swim or Climbe are specific to certain Situations and therefor don´t need to be used to often.However I think that Skills like Spellcraft or Appraise are Skills that could be better tied into the Game.