Actually finished more than one full season while playing EVERY game of the schedule? I've loved The Show and I've bought it every year since EA lost their baseball contract to 2K sports, but I've rarely made it past June of Year 1 in GM Mode and only once have I ever played enough MiLB games to make it to "The Show" in RTTS Mode as an end-of-year call-up (and, even then, I got sent back down a month later and had to work back up from AA).
If each game takes 30-45 minutes (GM Mode), and you play 162 games in a season, you're talking about over 100 hours of gameplay just to get to the postseason of Year 1 (compared to approx. 10 hours for a Madden/NCAA season or even 40-50 hours for an NHL season).
The graphics are always top-notch, the gameplay is great, but baseball's season is just too much for a video game...or is that just me?