What are the key attributes you look for when signing a player?? I don't use genie scout or anything like that would rather use my own scouts and staff for recomendations, it feels more real to me that way. Finding a gem here or there gives me something of a cheap thrill

Not knocking those who use it just not my cup of tea.
Anyways my key attributes are first touch for strikers and positioning is also 1 I like to be 13+ at least....
Usually when I am looking for player than my clicking for a player in my tactics and see what attributes that player is needed and than when I am looking for player I looking for attributes 10+
as macdab55 says, probably the best way for you to choose your players are the attributes highlighted when you select a player position in the tactics tab, however I find it very very important to consider their strengths and weaknesses according to what you need for your tactic.
I would also recommend focusing on the attributes recommended by the game's hints and tips, they look like this:
The ratings for reflexes, handling, communication, jumping and positioning are generally a good indicator for how good a goalkeeper is.
If you're looking for a good wing-back pay special attention to an individual's positioning, tackling, stamina, pace and acceleration.
Positioning, tackling, pace and anticipation are just some of the important characteristics that make for a good full-back.
A good centre-back will usually have high ratings for tackling, jumping, positioning, heading, strength, marking, bravery and team work.
Pace, dribbling, passing, off the ball, creativity, stamina and crossing are just some of the important characteristics that make for a good winger.
Passing, off the ball, creativity, technique, dribbling and stamina are just some of the important characteristics that make for a good attacking midfielder.
A good defensive midfielder will most likely have high ratings for tackling, work rate, stamina and positioning.
Pace, acceleration, dribbling, technique, finishing and off the ball are just some of the important characteristics that make for a good pacey striker.
Jumping, heading, strength and off the ball are just some of the important characteristics that make for a good target man.