Without knowing what sort of standard of player you are, it is very difficult to recommend repertoire for you to try.
As well as the "serious" pieces such as concertos and sonatas, I would take a look at the recital type pieces that exist in the trumpet repertoire.
Some that I use with my students are:
Bernstein - Rondo for Lifey
Bozza - Badinage
Street - Rondino
Arutunian - Aria & Scherzo
Bohme - Russian Dance
Ropartz - Andante & Allegro
Philip Smith (who is a name you should get to know) has recorded two CDs comprising some of the lighter recital repertoire. One is released under the New York Legends label, whilst the other is released through the International Trumpet Guild - if you are not familiar with the ITG you should check out their website -
www.trumpetguild.org - probably the finest trumpet resource on the web. There are suggested repertoire lists on there, as well as a superb "youth" site which I recommend to EVERY player - some superb articles and some truly outstanding advice.
If you want further suggestions, I have a stack of CDs that I will happily add to a listening list - but for the moment I hope that the above suffices.