Great shooitng and yes, .22 rocks!
I think the engineering of the guns and ammo has become so good these days, that there is little to choose between them. Shoot what you use the best, what suits your style of shooting best, and lets all enjoy the sport.
I've just ordered another new .22 (another AA S410, but a classic this time with thumbhole stock). So that will be three ,22s for me including a spirnger. If I do get another gun in the future, I'd have no issue with trying a .177. If you get a nice heavy pellet in a .177, they can be devasting in the right hands. Get a good med-w