https://www.dandwiki.com/wiki/5e_SRD:Weapon_Properties

Keep in mind these properties. Such as Finesse, when using a dagger, scimitar, short sword, whip, rapier, hoopack, dart or elvish sword of any kind that is not "heavy" you can use dexterity or strength to hit and damage.

Elvish weapons also require proficiency, but if you don't have it, it's not a penalty other than you're missing the proficiency+Dex or Str so your hit and damage modifier will be the same.

Also larger weapons have larger 'reach' so opportunity strikes can go out 10ft instead of 5ft. Glaives, guisarmes, lances, longspears, ranseurs, spiked chains, whips, and I'm adding any two-handed weapon with "great" prefix and any spear not just longspears.