It's all personal preference, style, manufacturer, caliber, make your mind up and enjoy it. If you're anything like many here....including myself, you'll have more than one.

Good luck choosing.
I started my pcp journey with a Marauder .22, basic gun, and hand pump, no frills. It shot alright for my backyard shooting, but would get fliers from every mag, no matter the ammo. Kept reading about the "more consistent" accuracy of higher priced guns and took some time researching, but jumped in after I sold the Marauder package.
The Condor SS .22 caught my eye, for their LW barrel, power wheel and wide range of ammo possibilities and gun accessories, so I now have one. A good shooter once you find the best pellet and power wheel set-up. Made my longest kill-shot of an invasive specie bird at lasered 97yds with the Condor.....quite possibly lucky shot
Decided I wanted a side lever repeater, no more bolts, bought a Weihrauch HW110 ST .177 - Nice gun, quite accurate with 10gr ammo it likes, whisper quiet with its' moderator. First impression, a bit heavy, but it is composite machined receiver along with the coated wood stock. Great backyard shooter.
Next purchase, an FX Dreamline Classic .22 with Donny Tanto,, this rifle MAY be my last buy, it's a real accurate rifle with most any pellets I've tried. As I get older, 68 in couple months, trying to simplify more and more. I don't care to get into the slug shooting fray, even though they do have appeal, I just don't shoot the ranges slugs were designed for. Although I have been watching for members posts on their Condors shooting slugs.... I could possibly see myself setting up my Condor as I longer range slug shooter. We'll see.