I have varried tastes but seem to keep coming back to my Les Baer Premier-II in .45ACP ($1300 8 years ago). Right now it's at Virgil Tripp having a few custom touches added (~$400), but even before that it was still the finest pistol I owned. I just bought an 9mm FN Hi Power ($400) and it is a ton of fun, too. Of course, revolvers are a blast...er...I guess I like them all!
However, it's not important what I like, it's important what you like. If Glocks seem to suit you, then the G17 is hard to beat for a plinking gun. The easy availability of inexpensive ammo makes it very practical. It will do as a fighting gun (not my 1st choice, but it will do) and should last many tens-of-thousands of rounds with minimal maintenance. Also, there are a bunch of available aftermarket accessories to customize it, should you think that necessary. Finally, it's not too expensive and should fit most budgets.