There's no shame in Plants v Zombies. Indie tower defense games with
cartoonish graphics don't appeal to everyone, but it had what it takes
to define a classic. And lucky they have not yet sullied the
franchise by releasing a thousand lookalikes and re-hashes of same (at
least that I'm aware of).
There are many reasons smaller, simpler games sometimes make you want
to pick them up instead of a game with deep story. Games with deep
stories force you to invest time and mental energy to follow some plot
that's mostly a victim of design-by-committee rather than a single
talented writer with a cohesive vision. Every once in a while a plot,
setting, acting etc comes along that appeals to you as an individual,
but probably the majority of the time it won't. Unlike a TV series
where you can just change the channel, or a movie that you wished you
could like but instead are just waiting for it to end, a game is
usually a more costly investment of money and time before you realize
that its not to your taste. Smaller casual games are much easier to
jump into and enjoy without the investment in story.
Casual games don't offer the realism / technology / depth of big
budget games, but I find that the execution is more important than the
plan when it comes to gaming, and for that reason big production games
are a coin toss. When they are good they can be REALLY good. First
person 3D can be very immersive. But at least with small casual
games, they are probably never going to appear on your radar unless
the execution of one guy's idea (or a very small team's) is top notch.
It might not be to your liking, but at least execution is tight.
I've been spending more time in MAME than anything else lately. I
find a lot of older arcade games not only still hold up, they hold up
in a way that the younger competition cannot even begin approach, even
with all the multi million dollar budgets and polygon pushing graphic
capabilities, if your metric is pure gameplay and fun factor over
story and eye candy. The intensely visceral 8-bit sounds and tight
control over sprites that the design simplicity affords is rarely seen
in today's games. But yes, I know if I was born 15 years ago, there
would probably be a certain WTF factor to them and I might not ever
give them a chance.