I may not own an Accent but here's a short list of mods that I would not like to see on your cars.
1. HIDs with excessive glare - 8000k & up.
2. LED strips ( regardless of the placement )
3. Free-flow muffler ( come on guys. )
4. Rubber ductail ( those FG looks better )
5. Tilting plates ( your cars are KDM not JDM )
6. Sick chrome stuff ( even wheels are included ...

)
7. Useless stickers ( don't ever put stickers on the body. backglass, its ok as long as its small. dont also bother buying those visors up front )
8. Bodykits ( looks ugly, really )
& here's a shortlist of what mods are eye catching
1. Aftermarket rims ( 16's would do. You would compromise a lot on 17's though it would really look good )
2. Lowering springs ( for that dropped stance )
3. Projector headlamps ( Bolt-ons from garyq would do )
4. Branded Super yellow or All-weather bulbs for foglights
5. A good set of ICE
6. All leather interior ( Thanks to lederinteria or seatmate )
7. ECU Reflash ( is that possible for the Accent ? )
8. Muffler cutter
9. OEM Mudguards
10. Horn