For me the most important factor is speed , i can place the team talks to my assman and click play without talking to the press before after or between the matches .
Training works , of course it is far from perfect but i can make a player from my academy to reach his potential in less than 4 years.
Tactics are okay , i have edit my fm06 tactic to kick butt and i am keep on winning not because it is a "cheat tactic" or anything but because AI can not deal with it (to a degree..i can not win CL with clubs from Finland on the 1st season).
In comparison with fm08 players follow my instructions more.
Scouting of course is laughable but this is another issue, scouting is laughable in 08 too.
It is far easier to buy players and players are not uberly annoying , of course they get to dislike coaches or one another but they are not the total fraksticks they are in 08.
You don't really need the best players on the planet to succeed !
Interface is better IMO .
In general far less depth and interaction more of a game and less of a simulation is what appeals to me , of course i wanted it to be even more of a game and even less of a simulator .
Also NO ridiculous DRM