This is a list of problematic roms in gpsp for OpenDingux (most of the time also valid for nativeOS emu)
Payback (extremely slow)
Doom (slow)
Doom II (slow)
Wolfenstein 3D (does not run at all)
Driver II (slowdowns in certain parts of the level)
Duke Nukem Advance (slow)
Smashing Drive (slow)
Need For Speed - Most Wanted (slow)
Grand Theft Auto Advance (crashes on loading the map, this bug can be worked around with a savestate from a different emu)
Penny Racers (crashes on main menu)