My church parish has about 3,000 members on the books, plus a fair amount of people who aren't members but do attend. On staff, we have between 4-6 priests at any given time.
Sundays, we have 5 Eucharistic services (7 am, 9 am, 9 am (not a typo, 2 different services at 9), 11 am, and 5 pm. Then, every other day, we have Morning Prayer, Evening Prayer, plus a Eucharistic service. It's an amazing blessing to have the option of attending services daily, or of not having to wait a full week, if I'm sick on Sunday or have to work.
In my experience, our clergy do an amazing job of keeping track of the flock, and I've never felt like just a face in the crowd. They know who I am, what's going on in my life, my struggles, my hopes.
I don't personally feel comfortable in smaller churches - I enjoy the larger ones, and the greater variety of activities and ministries available.
And while I certainly cannot speak for many other churches, I can vouch that my church does not preach Christianity-lite! (I think, all too often, such a charge is leveled at larger churches as a way of dismissing them without actually examining them).